Can Dogs Eat Tomatoes?

By the PawMathCalc Team · Updated October 26, 2026

Short answer: a little ripe, red tomato is fine for most dogs, but the green parts are not. Stems, leaves, vines and unripe green tomatoes contain solanine and tomatine, which can make dogs sick. Keep dogs away from tomato plants.

Why tomatoes can be good for dogs

Ripe tomatoes are low in calories (about 18 kcal per 100 g) and have vitamin C and potassium.
A cherry tomato is about 3 kcal.

Risks of tomatoes for dogs

Green tomatoes, stems, leaves and vines: stomach upset, drooling, weakness, and in large amounts a slow heart rate or tremors.
Tomato sauce, ketchup, salsa and pizza often contain onion and garlic, which are toxic to dogs, plus salt.
Acid can upset sensitive stomachs.

How to serve it

Only ripe, red, plain tomato, washed and cut up.
Remove any green stem.
Fence off vegetable gardens if your dog chews plants.

How much per day by dog weight

Treats of any kind should stay under 10% of a dog's daily calories. For a spayed or neutered adult dog that budget is shown below, with how many ripe cherry tomatoes (about 3.1 kcal each) fit in it if they are the only treat that day.

Dog's weight	Daily treat budget	Ripe cherry tomatoes per day
10 lb	35 kcal	up to 2 tomatoes
20 lb	59 kcal	up to 2 tomatoes
30 lb	79 kcal	up to 3 tomatoes
50 lb	116 kcal	up to 5 tomatoes
70 lb	150 kcal	up to 7 tomatoes
90 lb	181 kcal	up to 9 tomatoes

The amounts for larger dogs are capped below the calorie limit, because fiber, not calories, is what causes trouble with this food.

Start with one or two pieces the first time and watch for an upset stomach. Your own dog's budget is in the dog food calculator (it shows a "treats budget" line).

Check any other food

Not sure about something else in your kitchen? The can dogs eat it checker lists 98 foods as safe, careful or toxic, with the reason for each.

If your dog ate something toxic, call your vet, the ASPCA Animal Poison Control Center at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661.

Sources: ASPCA Animal Poison Control Center; American Kennel Club food guides; USDA FoodData Central (calories); treat budget from the RER formula used in WSAVA feeding guidance (10% rule).

Try the can dogs eat it? food checker

Enter your own numbers below, or open the full can dogs eat it? food checker with the formula and more examples.

This guide is general information, not veterinary advice. Your pet may differ: ask your vet. Terms

Frequently asked questions

Are tomato plants toxic to dogs?

Yes. The leaves, stems and green tomatoes contain solanine and tomatine. Call your vet if your dog chewed a tomato plant and shows signs like vomiting or weakness.

Can dogs eat tomato sauce?

No. Most sauces contain onion or garlic and a lot of salt.

Can dogs eat cherry tomatoes?

A few ripe red cherry tomatoes are fine for most dogs. Cut them for small dogs.