Is tomato plant toxic to guinea pigs?

If your guinea pig ate this

Contact a vet who treats small mammals now. Say it is a guinea pig and what it ate. Do not wait for signs.
Keep the packaging, label or a piece of the plant to show the vet.
Note what was eaten, roughly how much, and when.
If you cannot reach a vet, call a poison line that covers small mammals (below).
Do not try home treatment. Do not give food, drink or medicine unless a vet tells you to.

Your region

Animal PoisonLine (run by the Veterinary Poisons Information Service)
01202 509 000

We have not verified a poison line that covers small mammals for this region. Contact your nearest vet who treats small mammals, or an emergency vet clinic.

We have not verified a poison line that covers small mammals for this region. Contact your nearest vet who treats small mammals, or an emergency vet clinic.

Your own vet comes first. These services are run by other organisations and may charge a fee. All regions, fees and hours

Applies to: All pet guinea pigs. Leaves, stems and vines of the tomato plant (Solanum lycopersicum). Not the ripe fruit.
Also called: tomato leaves, tomato vine, tomato stalks, tomato plants

The Royal Veterinary College says not to feed the plant or leaves because they are poisonous, while the fruit can be eaten. Source: Royal Veterinary College
PDSA lists tomato vine and leaves among foods that are not safe for guinea pigs. Source: PDSA

Royal Veterinary College: Feeding your guinea pig (RVC Exotics Service) (opens in a new tab)
“Tomato (all types but do not feed the plant/leaves as this is poisonous!)”
Read on 10 October 2026
Royal Veterinary College: Feeding your guinea pig (RVC Exotics Service) (opens in a new tab)
“Poisonous garden and wild plants: … tomato plant (fruit can be eaten)”
Read on 10 October 2026
PDSA: Your guinea pig's diet (opens in a new tab)
“Not all fruits and vegetables are safe for your guinea pigs to eat … Tomato vine and leaves (the fruit is safe to feed)”
Read on 10 October 2026