Can My Guinea Pig Eat This?

Raw red bell pepper is one of the best daily Vitamin C sources for guinea pigs. It is rich in nutrients and lower in sugar than fruits.

Raw green bell pepper is an exceptional daily staple for guinea pigs, providing essential Vitamin C with lower sugar content than fully ripe peppers.

Raw yellow bell pepper offers a high dose of Vitamin C and antioxidants, making it a great daily addition to a cavy diet.

Raw orange bell peppers provide high Vitamin C and beta-carotene levels. They make a healthy daily snack for guinea pigs.

Bell pepper stems and calyxes belong to the nightshade family and contain toxic solanine, making them harmful for guinea pigs.

Strawberry flesh provides Vitamin C and antioxidants, but high sugar content means it should strictly be an occasional treat.

Strawberry leaves and tops are low in sugar and contain beneficial fiber and Vitamin C, making them a great green treat.

Kiwi flesh is exceptionally dense in Vitamin C, but its high sugar and acidity require strict portion control.

Fuzzy kiwi skin can irritate a guinea pig's delicate mouth and throat lining, and easily harbors heavy pesticide residues.

Raw orange flesh is loaded with Vitamin C, but due to high acidity and sugar, it must be fed sparingly as a rare treat.

Orange peels contain high levels of essential oils such as limonene and heavy wax coatings that upset guinea pig digestive systems.

Guava is extremely rich in Vitamin C, but because of its high natural sugar, it should only be fed in small quantities without seeds.

Papaya flesh offers excellent Vitamin C and beneficial enzymes, but high fruit sugars require small, infrequent treat portions.

Grapefruit contains Vitamin C but is far too acidic for guinea pigs, leading to mouth sores, lip ulcerations, and stomach pain.

Clementines offer Vitamin C in a sweet package; they are safe occasionally if seeds and peel are completely removed.

Lemons are extremely acidic and will cause severe mouth sores and stomach burning in guinea pigs. They should never be fed.

Raw kale is packed with Vitamin C and iron, but its high calcium content means it should be fed in moderation to prevent bladder stones.

Broccoli florets are very rich in Vitamin C, but brassica vegetables can cause intestinal gas if fed in large quantities.

Guinea pigs are strict herbivores whose digestive systems cannot process cooked foods, which destroy natural fiber and cause severe gut stasis.

Fresh parsley is an excellent high-Vitamin C herb that guinea pigs love, though high calcium content requires rotational feeding.

Fresh cilantro is a safe, vitamin C-rich herb that guinea pigs love. Serve it thoroughly washed as a flavorful occasional treat.

Dandelion greens are packed with vitamins A and C, but contain high levels of calcium. Feed them in moderation to prevent urinary sludge.

Dandelion flowers are a non-toxic, enjoyable snack rich in antioxidants. Feed them occasionally as a fun forage treat.

Common chickweed is a tasty, wild forage herb high in vitamins and minerals. Serve fresh from unsprayed areas as a treat.

Fresh basil offers fragrant aromatic flavor and vitamin C, but its calcium content means it should be fed in moderation.

Dill sprigs are safe and aromatic, offering vitamins A and C alongside essential minerals. Feed occasionally to add variety.

Spearmint and peppermint leaves are safe for guinea pigs in small amounts, serving as an aromatic treat rich in antioxidants.

Fresh rosemary is non-toxic but very pungent due to essential oils. Feed only tiny amounts very infrequently.

Thyme is non-toxic and contains vitamin C, but its strong aroma and moderate calcium level make it suitable only as a rare treat.

Fresh oregano leaves are safe and high in antioxidants, though their strong herbal flavor means guinea pigs should only eat small bits.

Curly parsley is packed with essential vitamin C, but high calcium and oxalic acid content mean it must be limited to occasional treats.

Broadleaf plantain is a common backyard weed that is safe, fiber-rich, and beneficial for digestive health when gathered clean.

Cleavers (goosegrass) is a safe wild forage weed that guinea pigs enjoy, offering natural fiber and mild tonic properties.

Lemon balm is a safe, citrus-scented herb in the mint family that provides antioxidants and variety to a guinea pig's diet.

Feathery fennel fronds are safe and tasty for guinea pigs, offering vitamin C and aiding digestive comfort in small amounts.

Fresh chamomile blossoms are safe for guinea pigs in small amounts, offering mild soothing properties and novel texture.

Raw stinging nettle causes severe oral, esophageal, and skin irritation due to stinging hairs containing histamine and formic acid.

Wild garlic contains disulfide compounds that destroy red blood cells, causing dangerous hemolytic anemia in guinea pigs.

Fresh buttercups contain ranunculin, which turns into toxic protoanemonin when crushed, causing severe mouth blisters and intestinal damage.

Ground ivy contains toxic volatile oils and pulegone that cause sweating, respiratory distress, and digestive poisoning in small animals.

Raw romaine lettuce is a crisp, daily staple green rich in Vitamin C and essential fiber for guinea pigs.

Raw green leaf lettuce is low in calcium and offers high hydration and Vitamin C, making it an excellent daily choice.

Red leaf lettuce offers low calcium levels and healthy antioxidants, serving as an ideal daily leafy staple.

Soft and tender butterhead lettuce is safe for guinea pigs in moderate amounts as part of a varied green mix.

Iceberg lettuce contains lactucarium and excessive water content, which can cause severe diarrhea and GI stasis in guinea pigs.

Raw Belgian endive is low in calcium and oxalates, providing a wonderfully crisp and safe green for guinea pigs.

Curly endive is rich in Vitamin C and fiber while remaining low in calcium, making it a great salad addition.

Raw escarole is a broad-leafed chicory green that supplies Vitamin C and fiber with safe calcium levels.

Radicchio is a chicory family member that provides great Vitamin C and antioxidants for guinea pigs.

Swiss chard leaves contain essential vitamins but are high in oxalates and calcium, requiring strict moderation.

Crisp Swiss chard stems are safe in tiny quantities but carry moderate oxalates and present a choking hazard if uncut.

Red Swiss chard is nutrient-packed but must be fed sparingly due to elevated oxalate and calcium content.

Raw bok choy leaves offer rich Vitamin C, but belong to the brassica family and can cause gas if overfed.

Watercress is a pepper-flavored leaf loaded with Vitamin C, but high calcium means it should only be an occasional treat.

Raw arugula provides a Vitamin C boost, but its moderate calcium content limits it to an occasional treat.

High in Vitamin C, mustard greens are nutritional powerhouses that should be restricted due to calcium and oxalates.

Turnip greens contain excellent Vitamin C but have very high calcium levels, requiring strict portion control.

Raw collard greens are nutritious but contain high levels of calcium, which can lead to bladder sludge if fed frequently.

Leafy tops of beets are rich in vitamins, but very high in oxalates and calcium, making them a rare treat.

Cooked spinach is extremely dangerous for guinea pigs because cooking concentrates oxalates and cavy digestion cannot process cooked food.

Raw blueberries are safe and packed with Vitamin C, but should only be fed as an occasional treat due to sugar content.

Watermelon rind is lower in sugar than the flesh and safe for guinea pigs, providing a crunchy snack.

Seedless apple slices offer Vitamin C and fiber, but high natural sugars mean they must remain a rare treat.

Apple seeds contain cyanogenic glycosides which release toxic cyanide when chewed and digested.

Bananas are rich in potassium but high in starch and sugar, which can easily cause constipation or obesity.

Banana peels are non-toxic and fibrous, though they often contain pesticides and are tough to digest.

Strawberries are rich in Vitamin C and appealing to guinea pigs, but their high sugar and acid content requires strict limits.

Watermelon flesh provides hydration and Vitamin C, but its high sugar and water content can trigger diarrhea.

Cantaloupe rind is a tough, lower-sugar treat, but the textured outer skin can harbor bacteria if not cleaned.

Cantaloupe flesh offers Vitamin A and C, but high sugar levels mean it must be strictly limited.

Raspberries contain antioxidant Vitamin C and fiber, but also natural oxalates and sugar.

Blackberries provide vitamin C and bioflavonoids, though excessive feeding can upset gut flora.

Pears are sweet and hydrating, but their high fructose content can cause bloating and loose stools.

Peach flesh is tasty and rich in Vitamin C, but peach stones are toxic and must never be offered.

Peach pits contain cyanogenic compounds and present a severe choking and intestinal blockage hazard.

Fresh raw cranberries are low in sugar and high in Vitamin C, though very tart.

Kiwi is an exceptional source of Vitamin C, but its high acidity and sugar mean it should be an occasional treat.

Pineapple offers Vitamin C and enzymes, but high acidity and sugar can inflame a guinea pig's mouth.

Honeydew melon flesh provides water and Vitamin C, but must be limited due to sugar content.

Mango is rich in Vitamin C and A, but has very high sugar levels that can disturb cecal fermentation.

Raw baby spinach leaves are rich in vitamin C but contain high levels of oxalates and calcium. Feed sparingly to prevent bladder stones.

Alfalfa hay is a legume hay containing high levels of calcium and protein unsuitable as daily food for adult guinea pigs. It increases the risk of urinary stones.

Alfalfa hay provides essential calcium and protein for growing guinea pigs under 6 months old as well as pregnant or nursing mothers.

First-cut Timothy hay is coarse, fiber-rich, and filled with seed heads. It is excellent for grinding down guinea pig teeth and aiding digestion.

Second-cut Timothy hay offers the optimal balance of leaf, stem, and fiber. It is the gold standard daily forage for adult guinea pigs.

Third-cut Timothy hay is very soft and leafy with minimal stems. It is ideal for senior pigs or those with mouth injuries but lower in dental-wearing fiber.

Orchard grass hay is a soft, fragrant grass hay that provides excellent fiber and low calcium. It is an ideal alternative for owners allergic to Timothy hay.

Meadow hay contains a natural mix of pasture grasses, herbs, and wild flowers. It provides good dietary fiber and encourages natural foraging.

Botanical hay consists of grass hay blended with herbs like chamomile, clover blossoms, or lavender. It adds variety and enrichment to the daily diet.

Oat hay is a crunchy grass hay harvested before grain matures. It is high in fiber and great for dental wear, though higher in starch if seed heads are abundant.

Raw kale leaves are packed with vitamin C and antioxidants but are high in calcium. Feed sparingly to prevent bladder stone formation.

Raw kale stems offer crunch and dental stimulation, containing similar nutrient and high calcium levels as the leaves. Serve only as a periodic treat.

Raw dandelion flowers are a safe, natural blossom treat. They provide behavioral enrichment and mild vitamins when harvested from pesticide-free areas.

Raw dill sprigs are flavorful herbs packed with nutrients, but their moderately high calcium content requires controlled portion sizes.

Raw cilantro (coriander) is a fantastic daily or regular herb for guinea pigs, providing vitamin C and moisture with relatively low calcium levels.

Raw basil leaves are safe and highly aromatic for guinea pigs. They contain beneficial nutrients but carry notable calcium content, so feed moderately.

Clover hay is a legume forage extremely rich in calcium and protein. It readily causes digestive gas, severe bloat, and bladder stones in adult guinea pigs.

Raw mature spinach leaves contain higher oxalic acid and calcium concentrations than baby spinach. They must be strictly limited to prevent severe bladder stones.

Bermudagrass hay is a high-fiber, low-calcium grass hay suitable as an everyday forage substitute for adult guinea pigs.

Raw red bell pepper flesh is one of the single best foods for guinea pigs, packed with vital Vitamin C to prevent scurvy.

Green bell peppers are lower in natural sugar than red ones while remaining an excellent daily source of Vitamin C.

Yellow bell peppers are a fantastic, Vitamin C-rich fresh treat that guinea pigs can eat every day.

Orange bell pepper flesh provides excellent Vitamin C supplementation with a sweet taste guinea pigs love.

The central core and seeds of bell peppers pose a choking risk and can become lodged in a guinea pig's teeth or throat.

Orange flesh is rich in Vitamin C but high in natural fruit sugars and citric acid, making it suitable only as a rare treat.

Orange rind contains concentrated essential oils, d-limonene, and pesticide residue that irritate a guinea pig's delicate stomach.

Grapefruit is far too acidic for guinea pigs and can cause painful cheilitis (mouth sores) and severe stomach distress.

Lemon flesh is dangerously acidic for guinea pigs, leading to mouth ulcers and gut dysbiosis.

Lime flesh contains extreme levels of citric acid that burn sensitive oral tissues and disrupt gut floral balance.

The green leafy top of a strawberry is lower in sugar than the fruit itself, offering safe Vitamin C and green foliage.

Guava contains high levels of Vitamin C, but its natural sugar content requires strict portion control.

Papaya seeds contain spicy compounds and carpaine that can upset guinea pig digestion and present choking hazards.

Raw Brussels sprouts are rich in Vitamin C, but can cause uncomfortable intestinal gas if fed too frequently.

Broccoli leaves are higher in Vitamin C and less gas-inducing than florets, making them a fantastic leafy green.

Guinea pigs are obligate herbivores equipped only for raw vegetation; cooked peppers disrupt gut flora and destroy natural nutrients.

Raw curly parsley is rich in Vitamin C, but its high calcium content means it should be offered as an occasional treat.

Flat-leaf parsley provides a great boost of Vitamin C, though its elevated calcium levels require limited feeding.

Chickweed is a safe garden weed rich in minerals that guinea pigs love, provided it comes from a pesticide-free zone.

Spearmint leaves offer aromatic enrichment and Vitamin C, but strong essential oils mean it should be fed sparingly.

Peppermint is safe in tiny amounts as an occasional treat, though its high menthol scent can be intense.

Rosemary leaves are non-toxic, but their pungent flavor and tough woody texture make them a very occasional treat.

Thyme is rich in antioxidants and Vitamin C, making a tiny sprig an excellent aromatic addition to greens.

Oregano is safe in small quantities, containing vitamins and antimicrobials, but high oil concentrations limit serving size.

Broadleaf plantain is a fibrous, nutrient-rich weed that supports gut motility and dental health in guinea pigs.

Ribwort plantain offers excellent fiber and natural astringent properties that promote healthy digestion.

Fresh white clover leaves are safe in small portions, but overeating can cause bloat due to gas production.

Drying neutralizes the stinging hairs of nettle, making it a nutrient-dense, iron-rich herb that supports immune health.

Fresh stinging nettle possesses trichomes that release formic acid and histamine, causing painful mouth and throat inflammation.

Chervil is a mild herb containing Vitamin C that can safely mix into weekly leafy green rotations.

Marjoram is a mild culinary herb safe for guinea pigs in small amounts as a scent and taste variation.

Lemon balm offers a calming citrus scent and beneficial antioxidants when offered in modest quantities.

Sage contains thujone, a potent neurotoxin that can cause digestive distress and neurological issues in small pets.

Tarragon can be fed in tiny amounts as an occasional herbal treat, though its strong anise flavor may not appeal to all.

Feathery fennel fronds are rich in Vitamin C and fiber, helping digest food while offering an aromatic treat.

Raw Belgian endive leaves are safe and beneficial for guinea pigs, offering a crisp texture and a good supply of Vitamin C. Feed 1 to 2 leaves once or twice a week due to moderate oxalate levels.

Red radicchio leaves are a nutrient-rich, low-calcium option for guinea pigs, rich in antioxidants and Vitamin C. Offer 1 to 2 leaves up to twice per week.

Romaine lettuce provides beneficial Vitamin C and hydration, but contains slightly higher calcium levels than leaf lettuce. Limit to 2-3 times per week.

Raw Swiss chard leaves offer abundant Vitamin C and mineral diversity, but their high oxalate level requires strict portion control to avoid kidney issues.

Raw Swiss chard stems are crunchy and full of fiber, but carry high oxalic acid levels like the leaves. Feed tiny stem pieces sparingly.

Raw bok choy leaves provide valuable Vitamin C and hydration. However, as a brassica, overfeeding can cause painful intestinal gas and bloat.

Raw watercress is a nutrient-dense green packed with Vitamin C. Due to its intense peppery flavor and mustard oil compounds, offer small sprigs occasionally.

Raw arugula (rocket) is rich in Vitamin C and antioxidants. Its peppery kick and moderate calcium content mean it should be given as an occasional treat green.

Raw lamb's lettuce (corn salad) is a gentle, nutrient-packed leaf green that is low in calcium and high in Vitamin C. Safe for regular inclusion in salad mix.

Cooked Swiss chard is dangerous for guinea pigs as cooking destroys natural fibers essential for gut motility and concentrates harmful oxalic acid.

Seedless raw apple slices offer vitamin C and fiber, but high natural sugar and acidity mean they should remain a rare treat.

Apple seeds contain amygdalin which releases toxic cyanide when chewed and digested, making them dangerous for guinea pigs.

Raw banana flesh is rich in potassium but extremely dense in sugar and starch, making it a high-risk treat for constipation if overfed.

Raw honeydew melon rind provides a fibrous, low-sugar crunch that guinea pigs enjoy as an occasional treat.

Raw pear slices are juicy and sweet, offering hydration and trace vitamins, but high sugar content restricts them to rare treats.

Pear seeds contain cyanogenic glycosides that release toxic hydrogen cyanide during digestion, posing serious danger to guinea pigs.

Raw mango flesh offers vitamin A and C, but its high sugar density makes it an infrequent treat item for guinea pigs.

Pitted raw cherry flesh provides vitamin C and antioxidants, though strict portion control is necessary due to sugar levels.

Cherry pits contain cyanogenic compounds that release deadly cyanide when cracked or crushed, and pose severe choking hazards.

Raw pineapple flesh contains beneficial vitamin C and enzymes, but high acidity and sugar can irritate a guinea pig's mouth and digestive tract.

Peach pits contain cyanogenic glycosides that break down into lethal cyanide and present an extreme choking and blockage risk.

Alfalfa hay supplies essential calcium and protein required by young guinea pigs under 6 months of age for optimal bone and muscle growth.

Damp or moldy hay harbors lethal fungal spores and mycotoxins that cause acute respiratory failure and severe gut dysbiosis.

Raw spinach provides vital vitamins and iron, but its high oxalate and calcium levels require strict portion control to protect bladder health.

Cooked spinach disrupts a guinea pig's hindgut fermentation and concentrates soluble oxalates, posing severe digestive and urinary risks.

Cilantro is a low-calcium, Vitamin C-rich herb that makes an ideal daily fresh green for adult guinea pigs.

Fresh green strawberry tops and leaves are safe, lower in sugar than the berry itself, and offer healthy fiber and vitamin C.

Clementines offer a boost of vitamin C, but like oranges, their sugar and acidity require strict portion control.

Tangerine flesh is rich in vitamin C, but high fruit sugar and citric acid limit it to a rare treat.

Blackberries are packed with vitamin C and antioxidants with lower sugar than many fruits, making them a good occasional treat.

Raspberries provide vitamin C and dietary fiber. They should be fed moderately due to natural fruit acids and sugar.

Blueberries contain high levels of vitamin C and antioxidants. Offer them in small quantities to avoid sugar overload.

Raw broccoli florets are rich in vitamin C and fiber, but can cause painful intestinal gas if fed in large quantities.

Cauliflower florets supply a good amount of vitamin C, but like other brassicas, can lead to intestinal gas if overfed.

Raw curly parsley leaves are rich in Vitamin C and fiber, making them a delicious treat for guinea pigs. However, high calcium and oxalate levels mean they should only be fed once or twice a week.

Raw flat-leaf Italian parsley stems offer great dental wear and Vitamin C for guinea pigs. Like leaves, they contain elevated calcium and oxalates so serve sparingly.

Dandelion leaves are a favorite forage item packed with Vitamin C and iron. Because they act as a natural diuretic and carry calcium, feed them as an occasional treat.

Raw yellow dandelion blossoms are safe and engaging treats that add variety and antioxidants to a guinea pig's diet. Feed sparingly as a floral snack.

Fresh chickweed is an excellent garden weed full of vitamins, minerals, and moisture. It is safe and highly palatable for guinea pigs.

Cilantro stems are crisp, hydrating, and packed with essential Vitamin C. They contain lower calcium than parsley, making them a fantastic weekly snack.

Dill weed provides aromatic variety, fiber, and Vitamin C for guinea pigs. Because of its distinct aromatic oils, offer it in small quantities.

Fresh chamomile flowers are safe for guinea pigs in small quantities, offering mild calming properties and floral variety.

Young raw sow thistle leaves (Sonchus species) are a soft, nutritious wild green loved by guinea pigs. Ensure prickly edges are trimmed.

Wild chicory leaves are crisp, leafy greens rich in fiber and vitamins. They make a fantastic addition to a guinea pig's natural forage menu.

Yarrow leaves can be fed to guinea pigs in strict moderation as a medicinal herb treat. Excessive intake should be avoided due to potent active compounds.

Purslane is a succulent garden weed rich in Omega-3 fatty acids and Vitamin C. However, high oxalate content requires strict moderation.

Cleavers (Galium aparine or goosegrass) are safe wild weeds that provide novelty and fiber. Feed tender young stems in small amounts.

Coltsfoot leaves contain toxic pyrrolizidine alkaloids that cause severe liver damage in small animals. They must never be fed to guinea pigs.

Raw catnip leaves are non-toxic to guinea pigs and do not cause the euphoric response seen in cats, though they can be offered as a rare herb treat.

Young borage leaves have a mild cucumber taste enjoyed by guinea pigs. Older leaves develop stiff hairs and trace alkaloids, so feed young leaves sparingly.

Raw lavender sprigs are non-toxic, but the concentrated essential oils give them a strong taste. Offer tiny amounts as an occasional fragrant treat.

Shepherd's purse is a safe wild weed for guinea pigs that provides natural dietary enrichment. Feed in small quantities to avoid digestive upset.

Buttercup flowers and leaves contain ranunculin, which converts to protoanemonin when chewed, causing mouth blistering, severe salivation, and colic in guinea pigs.

Raw curly endive is safe and offers good fiber and essential nutrients for guinea pigs. Its ruffled texture provides enrichment, but it should be rotated with other leafy greens.

Radicchio is a red chicory packed with antioxidants, low in calcium, and completely safe for guinea pigs. Its slightly bitter taste is a favorite for many cavies.

Romaine lettuce is a staple leafy green for guinea pigs, high in Vitamin C and fiber. However, feed upper leaves as white ribs can cause white calcium spots in some sensitive cavies.

Little Gem lettuce is a small, sweet variety of romaine that is safe and nutritious for guinea pigs. It supplies vitamin C and crucial fiber.

Oakleaf lettuce (red or green) is low in calcium and ideal for feeding guinea pigs daily. It adds variety and texture to their daily fresh salad.

Batavia lettuce (Summer Crisp) is crisp, tasty, and safe for guinea pigs, offering vitamins A and C with moderate hydration.

Cooked romaine lettuce is harmful because a guinea pig's digestive tract cannot process cooked foods, leading to severe GI stasis and gut flora imbalance.

Lollo Rosso is a red frilly lettuce that is low in calcium, rich in antioxidants, and safe for guinea pigs to consume daily as part of a varied diet.

Red Belgian endive (radicchio cross) is crisp, low-calcium, and safe for guinea pigs. It provides beneficial dietary fiber and vitamins.

Raw cranberries contain high levels of Vitamin C and antioxidants. Because of their tart taste and acid content, serve sparingly.

Raw plum flesh provides antioxidants and Vitamin C. High acidity and sugar require strict moderation.

Plum pits contain amygdalin, which breaks down into toxic cyanide when broken or ingested, and present a critical choking hazard.

Unlike dogs, guinea pigs can safely eat grapes in strict moderation, though high sugar content limits serving size.

Raw red seedless grapes offer antioxidants and hydration, but should only be fed as an occasional small treat due to sugar.

Raw apricot flesh contains Vitamin C and Vitamin A. Serve in small amounts after removing the hard toxic pit.

Apricot pits contain deadly cyanogenic glycosides and represent a severe choking and intestinal obstruction hazard for small animals.

Raw honeydew melon flesh provides hydration and Vitamin C, but should be strictly portioned due to high sugar and moisture content.

Swiss chard is loaded with vitamins but carries heavy oxalic acid and calcium levels that necessitate rare treat status.

Kohlrabi leaves offer high Vitamin C and solid fiber, but elevated calcium requires restricted rotation.

Raw spinach stems carry fibrous crunch but contain concentrated oxalates and calcium, requiring strict portion limits.

Carrot greens are loved by guinea pigs and packed with nutrients, but their high calcium content demands weekly portion control.

Bermuda grass hay is a high-fiber, low-calcium alternative hay that supports gastrointestinal health and keeps teeth trimmed.

Bell pepper leaves belong to the nightshade family and contain toxic solanine, which causes severe gastrointestinal upset and neurological harm. They must never be fed to guinea pigs.

Raw gold kiwi flesh is smoother and loaded with Vitamin C, but its elevated sugar level requires strict moderation to avoid digestive upset.

Raw navel orange flesh provides Vitamin C, but high citric acid levels can cause lip ulcers and stomach pain if fed too frequently.

Raw rose hips are natural Vitamin C powerhouses that make excellent healthy treats for guinea pigs when seeds and irritating inner hairs are removed.

Raw brussels sprouts are loaded with Vitamin C, but as a cruciferous vegetable, they can cause painful intestinal gas if fed in large amounts.

Raw chili peppers contain capsaicin, which causes severe inflammation, burning, and intense pain in a guinea pig's digestive tract and mouth.

Raw sweet basil leaves are a safe, flavorful treat for guinea pigs rich in Vitamin C and Vitamin A. Due to moderate calcium levels, feed them only as an occasional treat rather than a daily staple.

Raw broadleaf plantain weed is an excellent, fiber-rich garden forage for guinea pigs. It supports healthy gut motility and natural tooth wear.

Raw cilantro leaves are lower in calcium than parsley, making them a great daily or regular herb for guinea pigs rich in Vitamin C.

Flat-leaf Italian parsley leaves offer high Vitamin C, but possess high calcium and oxalic acid levels that require strict portion control.

Rosemary needles are safe in tiny quantities as an occasional treat, but their concentrated essential oils can be overwhelming if overfed.

Raw white clover leaves are safe in small amounts, but because clover can cause bloating and is rich in protein, moderation is crucial.

Purple dead-nettle is a common non-stinging garden weed that is safe, edible, and nutritious for guinea pigs in moderate fresh amounts.

Raw dandelion roots offer great dental wear and prebiotic fiber for guinea pigs, though they are richer than leaves and should be an occasional treat.

Cooked basil leaves are unsuitable for guinea pigs. Cooking alters nutrient profiles, breaks down fibers, and introduces unsafe oils or textures.

Ground ivy (Glechoma hederacea) is toxic to guinea pigs and other small mammals, causing severe gastrointestinal and respiratory distress.

Foxglove leaves contain cardiac glycosides that are extremely deadly to guinea pigs, even in microscopic quantities. Never feed.

Raw black nightshade leaves contain high levels of solanine, a glycoalkaloid toxin that is highly poisonous to guinea pigs.

Raw escarole is a broad-leaf endive that provides essential vitamin C and fiber for guinea pigs. Feed it 1-2 times per week to prevent excessive calcium accumulation.

Raw white Belgian endive offers a crisp, hydrating treat rich in vitamin C and lower in calcium than spinach. Feed small amounts a couple of times a week.

Raw red Swiss chard stems offer crunch and vitamin C, but contain oxalic acid and calcium. Serve infrequently as an occasional treat.

Cooked escarole is soft and cooked foods disrupt a guinea pig's cecal fermentation, causing painful bloating and potential gut stasis.

Raw frisée, a curly variety of endive, offers beneficial fiber and micronutrients. It can be served safely 1-2 times per week.

Raw watercress is rich in vitamin C and antioxidants, though its peppery flavor and high calcium content mean it should be served in small, infrequent amounts.

Raw Lollo Bionda lettuce is a soft, pale green frilly lettuce variety that is low in calcium and safe for frequent feeding.

Cooked kale cannot be safely processed by a guinea pig's hindgut fermenting system, leading to dangerous bloat and potential stasis.

Raw apple flesh offers vitamin C and fiber, but must be served strictly without seeds or core due to toxicity and choking hazards.

The green leafy top (calyx) of a strawberry is lower in sugar than the fruit and offers fiber and vitamin C for guinea pigs.

Green kiwi is packed with vitamin C, but its high acidity and sugar content mean it should only be fed occasionally without peel.

Raw pear flesh provides hydration and fiber, but contains notable sugar levels so it must be served sparingly without seeds.

Curly kale offers exceptional Vitamin C, but its elevated calcium levels mean it should be served only as an occasional treat.

Curly parsley is packed with Vitamin C and adored by guinea pigs, but its high calcium content requires moderation.

Raw dill is a safe aromatic herb that provides appetite stimulation, though it contains moderate calcium.

Cooking or soaking alfalfa pellets into sludges destroys pellet integrity, increases bacterial proliferation, and loads adult pigs with calcium.

Dried red clover hay contains high calcium levels and potent phytoestrogens that disrupt adult guinea pig hormonal and urinary health.

Raw bell pepper seeds pose a dangerous choking hazard and can become lodged in a guinea pig's teeth or esophagus.

Raw blackcurrants are packed with Vitamin C and antioxidants, but high natural sugar limits serving size and frequency.

Fresh common chickweed is a nutritious weed packed with vitamins C and A that guinea pigs love. It should be served occasionally as a forage supplement.

Raw cleavers (goosegrass) are a safe and nutritious weed treat enjoyed by guinea pigs. They provide natural fiber and nutrients when gathered from clean environments.

Poison hemlock leaves contain deadly piperidine alkaloids that cause rapid respiratory paralysis, neurological failure, and death in guinea pigs.

Raw stinging nettle leaves feature stinging hairs that inject histamine and formic acid, causing painful oral inflammation and severe distress to guinea pigs.

Raw marjoram leaves are safe for guinea pigs as an occasional treat, offering antioxidants and vitamin C in small, fragrant portions.

Radicchio is a red chicory variety that is safe and healthy for guinea pigs. It provides rich antioxidants and fiber, though its slightly bitter taste may be an acquired preference.

Raw Lollo Rossa lettuce is a frilly, red-leafed variety rich in antioxidants and very low in calcium. It provides great texture and safe hydration.

Curly endive is a nutritious chicory green packed with Vitamin A, Vitamin K, and fiber. It has a favorable calcium-to-phosphorus ratio for adult guinea pigs.

Cooked Swiss chard is dangerous for guinea pigs. Cooking concentrates oxalate compounds and ruins the natural raw fiber needed to keep cavy guts moving properly.

Mache (also known as corn salad or lamb's lettuce) is a delicate, mild leafy green that is safe and low in oxalates, making it a gentle treat for cavies.

Raw broadleaf chicory (catalogna) is a good source of fiber, Vitamin A, and Vitamin C. Its mild bitterness is appreciated by cavies, and its calcium levels are moderate.

Raw honeydew rind is safe for guinea pigs in tiny portions, providing helpful fiber while minimizing the sugar present in honeydew flesh.

Raw apple peel contains beneficial dietary fiber and trace Vitamin C, making it a safe treat when properly washed and seed-free.

Raw red raspberries supply Vitamin C and antioxidants, but their natural acidity and sugar require strict portion control.

Raw pitless cherry flesh is safe as a rare treat, packed with antioxidants and Vitamin C, but pits and stems must be completely removed.

Raw cherry pits are toxic to guinea pigs because they contain cyanogenic compounds and present severe choking and intestinal blockage risks.

Raw rhubarb leaves contain deadly concentrations of oxalic acid and anthraquinones that cause kidney failure and poisoning in guinea pigs.

Raw avocado flesh contains persin toxin and dangerous fat levels that disrupt small animal digestion and cause cardiac distress.

Dried raisins are far too high in concentrated sugars and sticky starch, putting guinea pigs at severe risk of gut stasis and severe tooth decay.

First cut timothy hay is rich in long fiber and coarse stems, making it ideal for grinding down constantly growing teeth and maintaining gut health.

Second cut timothy hay offers the perfect balance of soft leaves and fiber-rich stems, making it the most popular gold standard hay for adult guinea pigs.

Third cut timothy hay is soft and leafy with minimal stems, great for underweight or picky pigs, but lacks the dental abrasion strength of earlier cuts.

Alfalfa hay is far too rich in calcium and protein for adult guinea pigs, leading to bladder stones, sludge, and kidney damage.

Orchard grass hay is a sweet, soft, high-fiber grass hay with balanced calcium levels, making it a great Timothy alternative.

Meadow hay contains a varied blend of wild grasses and botanical fibers, providing excellent dental wear and gut health.

Oat hay is coarse, high-fiber hay with crunchy seed heads that guinea pigs love, but high starch content means limiting seed heads.

Botanical hay blends Timothy hay with fragrant herbs like chamomile and lavender, providing sensory enrichment.

Raw green Swiss chard leaves contain Vitamin C and phytonutrients, but heavy oxalate and calcium levels require sparse feeding.

Rapini is a nutrient-dense brassica packed with Vitamin C, but its high calcium and gas-producing nature requires strict limits.