Canned Tuna (in excess)
Verdict
Occasionally OK — but not as a regular diet.
Verdict
Small amounts of plain canned tuna in water (not oil) are safe for cats as an occasional treat. However, tuna is not a complete diet for cats — it lacks taurine, vitamin E, and other essential nutrients. Feeding tuna as a primary diet leads to nutritional deficiencies and mercury accumulation. Canned tuna also contains more sodium than cats need. Tuna addiction (cats refusing other food) is a real problem that develops from frequent tuna feeding.
Symptoms to watch for
- • none from occasional small amounts
- • mercury poisoning (chronic): hair loss, loss of coordination
- • steatitis (yellow fat disease) from vitamin E deficiency
- • nutritional deficiencies
What to do
Limit tuna to an occasional treat — a teaspoon or two, a few times per week at most. Always choose tuna in water with no added salt. Never use tuna as a primary cat food.
Related foods
Raw Fish
ToxicNever — thiaminase destroys vitamin B1, causing deficiency.
Fish & SeafoodTuna
CautionOccasionally OK — mercury risk with regular feeding.
Fish & SeafoodSalmon
SafeYes (cooked only) — do not feed raw salmon.
Fish & SeafoodShrimp
SafeYes (fully cooked, peeled) — a healthy lean protein.
Fish & Seafood