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Question:

Is it ok to give cat tuna water

I really need some advice right now. My little furball, Whiskers, has been giving me those big, pleading eyes every time I open a can of tuna, and I honestly don’t know if it’s safe to share the tuna water with him. It’s that liquid you find in canned tuna — super smelly and clearly tantalizing to a little cat. I’m worried about mercury or any hidden ingredients that might be in there. Is it safe to pour a bit into his dish as a treat, or should I avoid it altogether? Also, if you've got tips on how to make his meals a bit more exciting, I'm all ears! He deserves only the best, and I don’t want to mess up. Thanks in advance for any help or thoughts you might have!

Answer:

Hi there! It’s great that you’re reaching out to ensure your kitty is getting the best care. Let’s talk about tuna water and cats.

Cats can enjoy a bit of tuna water as an occasional treat, but it shouldn’t be a regular part of their diet. Tuna water might make a nice flavor enhancer, which can be particularly helpful if your cat is a picky eater or needs encouragement to drink more water. However, tuna fish itself is not nutritionally complete for cats and could lead to health issues like mercury exposure if given too frequently.

If you occasionally give your cat tuna water, ensure it's from tuna packed in water, not oil or brine. Also, avoid adding any spices or flavorings. Just use the plain tuna water.

Watch for any signs that your cat might not tolerate it well, such as vomiting, diarrhea, or changes in behavior or appetite. If you notice any of these symptoms, it might be time to skip the treat and see if these issues resolve.

If you have any concerns, or if your cat has underlying health issues, booking a video consult with Dial A Vet might be a great idea. We can discuss your cat's diet in detail and ensure they're thriving.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 17, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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