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Yes, guinea pigs can eat grapes as a small treat. Burgess advises seedless grapes only, just a couple sliced in half, once or twice a week. Grapes are one of the more sugary fruits and are low in vitamin C, so they are a treat to share, not a food to rely on. Never give raisins or sultanas.
| Safe? | Yes, as a treat |
| How much | 2 seedless grapes, halved, per guinea pig |
| How often | Once or twice a week |
| Best served | Fresh, washed, seedless, cut in half |
| Watch out for | Seeds, soft droppings, weight gain |
Are grapes good for guinea pigs?
In small amounts, yes, but they bring more sugar than goodness. Worked out from the Guinea Lynx food chart, grapes have about 16 g of sugar per 100 g (3.5 oz), three times the sugar of strawberries, and about 11 mg of vitamin C. The Vet Desk gives an even lower figure for vitamin C, about 3 mg per 100 g. Either way, a couple of grapes do little towards the 10 to 50 mg of vitamin C a guinea pig needs each day.
The PDSA says fruit should be given in very small amounts because it is high in sugar, and that hay and grass should make up 85 to 90% of the diet. Too much sugar can upset the gut bacteria and lead to loose droppings and weight gain. The Vet Desk adds that soft fruit does nothing to wear down a guinea pig's ever-growing teeth, which is hay's job.
How many grapes can a guinea pig eat?
Two seedless grapes per guinea pig, cut in half, once or twice a week. That is the Burgess guidance, and the Vet Desk agrees on once or at most twice a week. Don't add other fruit on grape days. The everyday diet stays the same: unlimited hay, about one cup of veg and about a tablespoon of pellets, as our guinea pig diet guide explains.
How to prepare grapes
- Pick seedless grapes. Burgess specifies seedless. If you only have seeded grapes, cut them open and take every seed out.
- Wash them well. Rinse under cold water to remove residue from the skin.
- Cut each grape in half. Burgess warns grapes can be a choking hazard, so never give a whole round grape.
- Clear up leftovers. The Vet Desk says to remove uneaten fruit within 4 hours, before it spoils.
Grapes are a handy bribe for nervous guinea pigs because they are small and easy to hand-feed. Use half a grape during handling practice, and count it as that day's fruit.
Seeds, skins, raisins and juice
- Skins: fine to leave on. Just wash them.
- Seeds: take them out, or buy seedless.
- Raisins, sultanas and currants: no. Dried fruit is concentrated sugar.
- Grape juice, jam and jelly: no. These are mostly sugar with no fibre.
- Frozen grapes: only fully thawed and halved, never as hard frozen balls.
Who should skip grapes?
Leave grapes out for guinea pigs that are overweight, have loose droppings or a sensitive stomach, and for babies. The Vet Desk's apple guide says small amounts of fruit are safe from about 3 to 4 months old, so wait until then.
What to offer instead
For a fruit with far more vitamin C, try strawberries, or go for blueberries or raspberries. For something less sugary, a piece of cucumber is a juicy everyday snack. See what can guinea pigs eat and our guinea pig care guide for the full picture.
Grape questions
Aren't grapes poisonous to pets?
Grapes and raisins are dangerous for dogs, and the ASPCA warns they can damage a dog's kidneys. Guinea pig sources treat them differently: Burgess lists seedless grapes as a safe fruit for guinea pigs in small amounts. That is why we say yes, but only a couple, and never raisins.
Can guinea pigs eat red and green grapes?
Yes, both. The Guinea Lynx food chart groups red and green grapes together, with the same sugar and vitamin C. Choose seedless ones of either colour, wash them and cut them in half. Black seedless grapes are fine in the same small amounts.
Can guinea pigs eat raisins or sultanas?
No. Raisins and sultanas are dried grapes, so the sugar is packed into a tiny, sticky piece. The Vet Desk does not recommend dried fruit for guinea pigs, and Woodgreen warns that dry mixes with dried fruit can harm their health and teeth.
Can guinea pigs eat grape leaves or vines?
None of the welfare or vet sources we use cover grape leaves or vines, so we would not offer them. Stick to the fruit itself, and pick safe greens such as romaine lettuce or coriander (cilantro) for leafy food instead.
