My 4kg cat ate a couple of ripe tomato slices from the picnic table—should I be concerned?

Short answer

You should monitor her closely. The ripe red flesh of a tomato is generally okay in small amounts, but the green parts like the stem or leaves contain solanine, which is toxic. Since you found her at a party table, check if she also ate any green bits or unripe fruit. Watch for signs like drooling, vomiting, or lethargy over the next few hours, and if she shows any of these, call your own vet for advice.

Tomato — Food safety facts

Feed with care · Cats · full breakdown on the linked food page

Ripe red fruit is fine in small pieces. Green parts (leaves, stem, unripe fruit) contain solanine, which is toxic.

Dogs and cats carry the same rating (Feed with care), so the notes below hold for either pet.

Tomato is not poisonous to cats, but it is easy to over-feed. Rich fat, salt or seasoning can bring on vomiting or diarrhoea within a day, and repeated large portions are a recognised trigger for pancreatitis.

If it ate some before you noticed, watch for vomiting, diarrhoea, loss of appetite, unusual tiredness or a painful, swollen abdomen over the next 24 hours. A one-off small amount in a healthy adult usually passes with water and rest; repeated exposure, a puppy or kitten, a senior, or a pet with an ongoing illness is a reason to call your vet the same day.

The full verdict, portion guidance and serving notes are collected on the Tomato food facts page.

Open the full food page: Tomato food facts →

My 4kg cat ate a couple of ripe tomato slices from the picnic table—should I be concerned?

Tomato — Food safety facts

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