Can Cats Eat Tomatoes?
Caution — a tiny piece of ripe red tomato is harmless to cats. But the green parts of the tomato plant are toxic to cats too, and a potted tomato plant is a real risk for a cat that likes to chew.
Last reviewed: July 24, 2026
What to know
Cats are usually indifferent to tomato; if yours is curious, a fingernail-sized piece of ripe tomato is fine. The real caution is the plant: solanine in stems, leaves, and unripe fruit can cause vomiting, drooling, and lethargy in cats. If you grow tomatoes on the balcony, keep the plant out of chewing range.
Tomato sauce, paste, and ketchup are unsuitable due to salt, sugar, and onion-garlic. The "tomato pomace" listed in some cat foods is a processed, safe fiber — seeing it on a label is not a concern.
Watch for these signs
- Vomiting, diarrhea
- Excessive drooling
- Lethargy
If you notice any of these, contact a veterinarian without waiting.
Frequently asked questions
My cat chewed a tomato leaf — what now?
A small amount usually passes with mild stomach upset; if vomiting or lethargy persists, or a lot was eaten, contact your veterinarian.
Is tomato pomace in cat food harmful?
No — pomace in pet food is a safe fiber made from ripe fruit. Do not confuse it with the plant's green parts.
Related answers
Sources
This guide is based on publications from the following veterinary bodies. Where sources differ, we take the more cautious position; the final decision is always your veterinarian's.