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No, guinea pigs should never eat avocado. The RSPCA, PDSA, Woodgreen and RSPCA Australia all list it as a food to avoid. Every part of the plant, flesh, skin, stone and leaves, contains persin, which can damage the heart, and the flesh is far too fatty for a guinea pig. If yours has eaten some, ring a vet.
| Safe? | No |
| How much | None |
| How often | Never |
| Best served | Not at all, in any form |
| Watch out for | Guacamole, salads, dropped pieces, avocado plants |
Why can't guinea pigs eat avocado?
Two problems. First, persin. The ASPCA names persin as the toxic part of the avocado plant, with breathing trouble, fluid build-up and heart failure listed as signs in the animals it covers, such as horses. The vet-reviewed guide at The Vet Desk says persin is toxic to guinea pigs too and can cause diarrhoea, heart muscle damage and death, and that it is found in the leaves, skin, stone and flesh in varying amounts.
Second, fat. Guinea pigs are strict plant-eaters built for hay, grass and leaves. Avocado is one of the fattiest fruits there is, and The Vet Desk warns this can cause gut and weight problems on its own.
Every charity we checked agrees: the RSPCA lists avocado under foods guinea pigs can't eat, the PDSA lists it among foods to avoid, Woodgreen rules out any part of the plant or fruit, Burgess calls it poisonous, and RSPCA Australia says to avoid it.
Which parts are dangerous?
- Flesh, ripe or unripe: no.
- Skin and stone (pit): no. The stone is also a choking risk.
- Leaves and the plant: no.
- Guacamole and avocado dishes: no, and they often hold onion and garlic too.
- Avocado oil and treats made with it: no; skip anything that lists avocado.
My guinea pig ate avocado: what should I do?
- Take the rest away. Remove any avocado and work out roughly how much and which part was eaten.
- Ring a vet. Call your vet or an out-of-hours vet straight away for advice, even if your guinea pig seems fine. The Vet Desk notes some guinea pigs show no effects, but that this isn't guaranteed.
- Don't try to make them sick. Guinea pigs can't vomit. Keep hay and water available.
- Watch for 48 hours. Look for runny droppings, not eating, fast or laboured breathing, weakness or a swollen belly, and tell the vet at once if anything changes.
Vets usually give supportive care, such as fluids, pain relief and help with feeding. Our guinea pig health guide covers other warning signs.
Safe foods to offer instead
If you want a soft, rich-tasting treat, a small piece of mango now and then is safe. For everyday food, stick to hay, leafy greens and bell peppers. Other foods to keep off the menu include onions, potatoes and chocolate. See the safe food list, our guinea pig diet guide and the guinea pig care guide.
Avocado questions
Is ripe avocado flesh safe for guinea pigs?
No. Some people argue ripe flesh has less persin, but the vet-reviewed guide at The Vet Desk says there isn't enough evidence that any part is safe. The flesh is also very high in fat, which a guinea pig's gut is not built for. The charities say avoid it, full stop.
Can guinea pigs eat guacamole?
No, and it is worse than plain avocado. Guacamole usually has onion and garlic, both on the guinea pig avoid lists, plus salt, lime and sometimes chilli. Keep dips and leftovers well away from the cage and floor time area.
What if my guinea pig licked or nibbled avocado?
Remove the rest and ring a vet for advice, even for a small amount, and say what part was eaten. Then watch closely for 48 hours for runny droppings, not eating, breathing changes or weakness. Guinea pigs can't vomit, so never try to make them sick.
Can guinea pigs eat avocado leaves or the stone?
No. The Vet Desk lists persin in the leaves, skin, stone and flesh, and the ASPCA lists the plant as toxic to animals such as horses. The stone is also a choking and blockage risk. If you grow an avocado plant indoors, keep it out of reach during floor time.
