Ripe tomato flesh is tolerated in small amounts. ASPCA lists the plant as toxic because of the green parts.
Ripe flesh, yes in small amounts. The plant, no. ASPCA lists the tomato plant as toxic to dogs because stems, leaves, and unripe green fruit carry solanine and tomatine.
This is a question where the answer splits by which part of the plant went down. A slice of ripe tomato off a chopping board is not the same event as a dog stripping a vine in the garden.
The glycoalkaloids that make tomatoes a listed plant toxin sit mostly in the green tissue. As the fruit ripens, the concentration in the flesh drops sharply. That is why ASPCA flags the plant while AKC treats ripe flesh as an occasional small offering.
Ripe means fully red and off the vine. A green tomato is not an underripe treat, it is the part with the most of the compound in it.
Dogs that chew vines swallow leaves and stems, and that is the exposure that produces reported signs: drooling, vomiting, diarrhoea, lethargy, and appetite loss. Larger ingestions have been associated with weakness and changes in heart rate.
A garden raid is also unmeasurable. You cannot count leaves the way you can count grapes, so call and describe the plant rather than estimating a dose. Photograph the damage before you tidy it.
If the vegetable patch holds onions too, say so. See whether dogs can eat onions, which is a much narrower toxin file.
Pasta sauce, ketchup, salsa, and tinned tomatoes are rarely just tomatoes. Onion and garlic are standard, salt is high, and sugar is common. The tomato is usually the safest thing in the jar.
Answer the sauce question by its other ingredients. If a dog cleaned a bolognese pan, the onion and the fat matter more than the tomato does.
For the plain starch half of that same plate, see whether dogs can eat rice.
Ripe red flesh in small amounts is generally tolerated. The green parts of the plant are the problem. ASPCA lists the tomato plant as toxic to dogs because of solanine and tomatine in stems, leaves, and unripe fruit.
Stems, leaves, and green unripe fruit. Those hold the highest concentration of the glycoalkaloids. A ripe tomato has far less of them.
Call. Eating vines and leaves is the version that produces real signs, and the amount from a garden raid is hard to estimate. Take a photo of the plant.
Ripe ones are the same food in a smaller package, but the size is a choking risk for small dogs. Halve them or skip them.
No, as a rule. Sauces carry onion and garlic, salt, and sugar, and those are the ingredients that cause the problem rather than the tomato itself.
Drooling, vomiting, diarrhoea, lethargy, and appetite loss are reported. Large ingestions have been linked to weakness and heart rate changes. Report what the dog ate, not just that it was a tomato.
Reader notes are not veterinary advice. If an animal is unwell, call the veterinarian who sees them.
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