Meat & Fish
Can dogs and cats eat tuna?
Short answer on tuna: safe only with care for both dogs and cats. See what to watch for and the veterinary sources behind each answer.
One food, two pets
What changes between dogs and cats?
Dogs and cats both have a caution verdict.
The label matches, but the two answers are not interchangeable. Check the bottom line, named hazard, and signs to watch for your pet below.
- Bottom line differs
- Named hazard differs
- Signs to watch differs
Tuna safety for dogs
Occasional small amounts of tuna are generally tolerated, but tuna's naturally high mercury content makes it unsuitable as a regular food, especially for small dogs and puppies.
Toxic principle: Mercury bioaccumulation with regular or excessive consumption
Watch for
- Chronic mercury exposure: incoordination, tremors, kidney effects
Tuna safety for cats
Tuna should only be an occasional treat for cats: it accumulates mercury over time and raw or tuna-heavy diets are linked to thiamine deficiency.
Toxic principle: Mercury bioaccumulation; thiaminase enzyme depleting vitamin B1 when tuna is a dietary staple
Watch for
- Chronic mercury toxicity: hind-leg weakness, tremors, incoordination, in severe cases blindness or seizures
- Thiamine deficiency: appetite loss, neurological signs
Questions owners ask about tuna
Can dogs eat tuna?
Occasional small amounts of tuna are generally tolerated, but tuna's naturally high mercury content makes it unsuitable as a regular food, especially for small dogs and puppies.
Is tuna safe for every dog?
Not necessarily. Occasional small amounts of tuna are generally tolerated, but tuna's naturally high mercury content makes it unsuitable as a regular food, especially for small dogs and puppies. Ask your veterinarian first if your dog has an existing health condition or you are unsure.
What symptoms should I watch for with tuna and dogs?
Chronic mercury exposure: incoordination, tremors, kidney effects. If you notice any of these, contact your veterinarian.
Can cats eat tuna?
Tuna should only be an occasional treat for cats: it accumulates mercury over time and raw or tuna-heavy diets are linked to thiamine deficiency.
Is tuna safe for every cat?
Not necessarily. Tuna should only be an occasional treat for cats: it accumulates mercury over time and raw or tuna-heavy diets are linked to thiamine deficiency. Ask your veterinarian first if your cat has an existing health condition or you are unsure.
What symptoms should I watch for with tuna and cats?
Chronic mercury toxicity: hind-leg weakness, tremors, incoordination, in severe cases blindness or seizures, Thiamine deficiency: appetite loss, neurological signs. If you notice any of these, contact your veterinarian.
This page is for informational purposes only and is not veterinary advice. Always consult your veterinarian about your pet's diet and health.
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Read our methodology for how every verdict is sourced and reviewed.