Can Cats Safely Eat Tuna? A Complete Guide

Tuna is a popular fish in human diets, but can cats eat it safely? While small amounts of cooked tuna may not harm most cats, raw or excessive tuna poses real risks. This guide explores the truth behind feeding tuna to felines, based on 2025 veterinary insights and expert recommendations.

The Risks of Feeding Raw or Excessive Tuna

Raw tuna contains thiaminase, an enzyme that breaks down thiamine (vitamin B1), leading to deficiency if consumed regularly. For cats, thiamine deficiency causes neurological issues, lethargy, and even seizures. Moreover, raw tuna often carries parasites, while canned tuna in water—though safer—still risks sodium overload and mercury buildup over time.

How Much Tuna Is Safe for Cats?

Moderation is key. A tiny, cooked piece (about 1 teaspoon per 10 lbs of body weight) once in a while is unlikely to harm healthy adult cats. Kittens and cats with kidney or heart conditions should avoid tuna entirely. Veterinary sources emphasize that tuna should never replace balanced, species-appropriate cat food.

Best Alternatives to Raw or Regular Tuna

For safer options, stick to fresh, cooked white fish like cod or haddock—cooked plain without spices or oils. Commercial cat treats with tuna flavor but formulated for feline nutrition offer convenience without risk. Always check labels for added salt or preservatives. Incorporating occasional tuna as a treat, not a staple, supports variety without compromising health.

Final Thoughts: Feed Tuna Wisely

Tuna can be a tasty occasional snack for cats, but it’s not a nutritional necessity. Prioritizing species-appropriate meals ensures long-term wellness. Monitor your cat for signs of digestive upset or behavioral changes after feeding tuna. When in doubt, consult your veterinarian to tailor diet choices to your pet’s unique needs.
Make smart choices today—your cat’s health depends on it.