It’s tomato season! Many dog owners love sharing healthy foods with their pets from the local farmer’s market or their own garden. But while fresh green beans are well-known safe foods for dogs, tomatoes present a question mark: Are tomatoes safe for dogs? Can dogs eat tomatoes without risk?
The answer is yes and no. If your dog’s gotten into your tomato patch, wolfed down a runaway cherry tomato, or has a habit of begging for a bite of just about anything, a little taste is typically fine. Ripe red tomatoes are generally safe in moderation, but young, green tomatoes and tomato-based products can be harmful for dogs. Read on for the details, plus what to do if your dog got into your tomato plant.
Can Dogs Eat Tomatoes?
The short answer is yes, with conditions. Fully ripe tomatoes are generally safe for most dogs in small amounts. Tomatoes should be offered as an occasional treat rather than a staple of their diet. As is the case for any new food, individual dogs may react differently.
When it comes to dogs and tomatoes, there’s a simple rule to remember: red is good and green is bad.
Which Parts of the Tomato Plant Are Toxic to Dogs?
Along with eggplants and peppers, tomatoes are a member of the nightshade family and contain naturally occurring compounds whose levels vary depending on just how ripe the fruit is.
These compounds, known as glycoalkaloids, serve as natural insecticides to protect growing plants. The two that can cause trouble in tomatoes are called tomatine and solanine, and they’re concentrated in the green parts of the tomato plant, which is what makes those parts toxic to dogs.
That means dogs should not eat tomato stems, leaves, vines, and green tomatoes. As tomatoes ripen, their tomatine levels drop dramatically. That’s why ripe tomatoes are safe, while unripe ones are not.
Dogs with access to gardens are at higher risk of getting into the parts of the tomato plant they shouldn’t be eating, so keep an eye on any curious pup if you grow plants in your backyard or on your porch.
In most cases, the problem isn’t a dog munching on a ripe tomato but gnawing on the actual plant.
What Should I Do If My Dog Ate a Tomato, Green Tomato, or Tomato Plant?
First, don’t panic: If your dog ate a tomato that was ripe and red, there’s usually no cause for alarm. If your dog has eaten a green tomato or tomato plant, however, remove access to plant material, estimate how much was consumed, and monitor for symptoms.
Potential signs of mild to moderate tomato toxicity in dogs include:
- Vomiting
- Diarrhea
- Drooling
Signs of serious toxicity that warrant immediate veterinary care include:
- Weakness
- Lethargy
- Tremors
- Loss of coordination
Allergic reactions, while rare, could also cause itching, swelling, or trouble breathing.
If your dog has eaten a significant amount of tomato plant matter or you notice any of the above symptoms, contact your veterinarian or—for 24/7 support—call the Pet Poison Helpline at 855-764-7661 (head’s up: there’s an $89 fee, which includes ongoing follow-ups).
Be prepared to share what your dog ate, when, and how much, as well as their current weight (knowing the dog’s size helps professionals assess the situation and determine next steps). In most cases, the prognosis is good; according to the Pet Poison Helpline, prompt care is the most important factor.
Potential Benefits of Tomatoes for Dogs
Tomatoes contain a slew of good-for-you nutrients, including vitamin C, vitamin A, potassium, fiber, and antioxidants like lycopene.
While dogs don’t need dietary vitamin C (their livers naturally produce it), they do benefit from the other vitamins and minerals found in tomatoes, which help support healthy vision, immune function, and strong muscles and bones.
That said, the nutritional boost tomatoes offer dogs is minimal. Dogs typically receive complete nutrition from a balanced commercial diet, with no need for supplementation unless they have special health needs. In other words, think of tomatoes as a treat, not a health food.
Risks of Feeding Tomatoes to Dogs
Even ripe tomatoes can turn dogs’ stomachs, especially if a dog has a sensitivity to acidic foods. Possible concerns include:
- Gastrointestinal upset
- Vomiting
- Diarrhea
- Allergic reactions
These risks rise with quantity, which is why moderation matters even with perfectly ripe fruit.
Can Dogs Eat Tomato-Based Foods?
Most often, the real risk isn’t fresh tomatoes at all, it’s tomato-based foods like tomato sauce, ketchup, salsa, pizza sauce, and canned tomato products.
These processed tomato foods are not ideal for dogs because they often contain added sugar, salt, garlic, onion, spices, and seasonings. Garlic and onion, in particular, are toxic and belong in the category of foods to never feed your dog.
Usually, it’s the added ingredients in tomato products that are more concerning than the tomatoes themselves. Any signs of illness are your cue to contact your veterinarian for your dog’s safety and your peace of mind.
How to Safely Feed Tomatoes to Dogs
Dogs can safely eat tomatoes in moderation.
Follow these guidelines:
- Offer only ripe red tomatoes.
- Remove all stems and leaves.
- Wash the tomato thoroughly.
- Serve small portions (think: a thin slice or cherry tomato cut into pieces).
- Introduce tomatoes gradually, as you would any new food.
Dogs with sensitive stomachs may tolerate tomatoes worse than others, so start with a tiny amount and watch how your dog responds, or skip it and stick with a specialized diet.
Can Puppies Eat Tomatoes?
Technically, ripe tomato flesh isn't toxic to puppies, but that doesn't make it a good idea. Puppies’ rapidly growing bodies need a complete puppy food that meets all their nutritional needs, and treats can crowd out those calories. Their smaller size also means even a little green tomato goes a long way. Always consult your veterinarian before introducing puppies to new foods like tomatoes.
Tomatoes for Dogs: Never Green, Always in Moderation
Ripe tomatoes are generally safe for most dogs when fed in moderation. Green tomatoes, stems, leaves, and vines, on the other hand, contain compounds that may be toxic to dogs if consumed in significant amounts, and tomato products often contain ingredients that aren’t safe for dogs. Any signs of illness after tomato ingestion are your cue to contact a veterinarian. An unexpected chomp in your tomato patch, however, is typically no cause for concern.
