Can cats eat tomatoes? A pet nutritionist’s guide
Ripe tomato in small amounts is unlikely to hurt a cat, but the rest of the plant is a different story. Here’s what’s actually safe and what isn’t.
Tomatoes are a common ingredient in human cuisine, found in everything from fresh salads to pasta sauces. But when it comes to sharing our food with our feline companions, it’s important to consider whether tomatoes are safe for cats to consume. While small amounts of ripe tomato may not be harmful, other parts of the plant can be toxic. This article explores the nutritional facts of tomatoes, situations where cats might eat tomatoes, potential risks of overconsumption, and safe amounts for cats. I will also provide my professional recommendation as a companion animal nutritionist.
Nutritional facts of tomatoes
Tomatoes (Solanum lycopersicum) are nutrient-dense fruits rich in vitamins and antioxidants. Some key nutritional components include:
Despite these nutrients, tomatoes are not an essential part of a cat’s diet and offer little benefit compared to animal-based sources of nutrition.
Situations and risks
While most cats are obligate carnivores and prefer meat-based diets, there are situations where they may come into contact with tomatoes:
Some cats enjoy playing with small, round objects like cherry tomatoes, which may lead to accidental ingestion.
Cats may consume tomatoes as part of sauces, soups, or other prepared foods.
Some owners may intentionally offer small pieces of ripe tomato as a snack.
Some cat food brands use tomato pomace as a source of fiber and antioxidants in their formulations.
Although ripe tomatoes themselves are not highly toxic to cats, other parts of the plant and excessive consumption can pose risks:
Green, unripe tomatoes and tomato plants contain solanine and tomatine, glycoalkaloids that can be toxic to cats if ingested in large amounts (Friedman, 2006). Symptoms include vomiting, diarrhea, lethargy, and in severe cases, neurological issues.
Even ripe tomatoes can cause stomach upset, leading to nausea, vomiting, or diarrhea, particularly in cats with sensitive digestive systems.
The natural acidity of tomatoes may cause stomach irritation or acid reflux in some cats.
When tomatoes are found in processed foods, additional ingredients such as garlic, onions, and excessive salt can be dangerous for cats (Gwaltney-Brant, 2012).
Safe amounts of tomatoes for cats
If you want to offer your cat a small taste of tomato, it is crucial to follow these guidelines:
- Only ripe tomatoes. Avoid unripe tomatoes and any part of the tomato plant.
- Small portions. A tiny piece of ripe tomato (about the size of a small pea) is a safe starting point.
- Monitor for reactions. Watch for signs of digestive upset or allergic reactions.
- Avoid seasoned or processed tomatoes. Do not feed cats tomatoes from sauces, canned products, or dishes containing added seasonings.
- Infrequent treats. Tomatoes should not be a regular part of a cat’s diet, but an occasional small taste is unlikely to cause harm.
Pet nutritionist’s recommendation
As a certified companion animal nutritionist, I always advocate for species-appropriate diets. Cats are obligate carnivores, meaning their nutritional needs are best met through animal-based proteins and fats rather than plant-based foods. While a small amount of ripe tomato is not likely to harm a healthy cat, there is no real nutritional benefit to including it in their diet.
If your cat accidentally nibbles on a piece of ripe tomato, there is no need to panic, but I would not recommend offering tomatoes intentionally. More importantly, pet owners should ensure that their cats do not have access to tomato plants, unripe tomatoes, or tomato-based foods that contain added seasonings or toxic ingredients.
If you are looking for safe and beneficial treats for your cat, consider options such as freeze-dried meat treats or small amounts of cooked, unseasoned poultry. These choices align more closely with a cat’s natural dietary requirements.
Andrea Geiger is a certified companion animal nutritionist with a master’s degree in Veterinary Toxicology and Nutrition. With over five years of experience in product development and consulting, Andrea specializes in creating science-based nutrition plans and formulating recipes that prioritize pet health, ensuring optimal nutrition for dogs and cats alike.
References
- Case, L. P., Daristotle, L., Hayek, M. G., & Raasch, M. F. (2011). Canine and Feline Nutrition: A Resource for Companion Animal Professionals. Elsevier Health Sciences.
- Friedman, M. (2006). Potato glycoalkaloids and metabolites: Roles in the plant and in the diet. Journal of Agricultural and Food Chemistry, 54(23), 8655-8681. https://doi.org/10.1021/jf061471t
- Funaba, M., Matsumoto, C., Matsuki, K., Gotoh, K., Kaneko, M., Iriki, T., & Hatano, Y. (2005). Requirement of potassium in feline adults: Dietary potassium content affects potassium status. Journal of Nutrition, 135(9), 2225-2230. https://doi.org/10.1093/jn/135.9.2225
- Gwaltney-Brant, S. (2012). Toxicology of foods. In Peterson, M. E., & Talcott, P. A. (Eds.), Small Animal Toxicology (3rd ed., pp. 643-660). Elsevier Saunders.
- Hewson-Hughes, A. K., Hewson-Hughes, V. L., Colyer, A., Miller, A. T., McGrane, S. J., & Butterwick, R. F. (2011). Geometric analysis of macronutrient selection in the adult domestic cat. British Journal of Nutrition, 106(1), 71-80. https://doi.org/10.1017/S000711451000590X
- National Research Council (2006). Nutrient Requirements of Dogs and Cats. The National Academies Press.
- Rao, A. V., & Agarwal, S. (2000). Role of antioxidant lycopene in cancer and heart disease. Journal of the American College of Nutrition, 19(5), 563-569. https://doi.org/10.1080/07315724.2000.10718953