Is feeding fish to your cat a good idea? Facts & advice

Many cat owners wonder if feeding fish to their feline companions is a healthy choice. Fish is often seen as a natural treat for cats, with many cat food flavours featuring fish ingredients. However, while fish can be nutritious, feeding it to your cat requires careful consideration and moderation to ensure their health and wellbeing.

This article explores the risks and benefits of feeding fish to cats, the best types of fish to offer, allergy considerations, and how to safely include fish treats in your cat's diet.

1. Fish Allergies in Cats: What to Watch For

While not common, some cats develop allergies to fish, making it one of the notable allergenic ingredients alongside grains. If your cat experiences frequent low-level digestive issues, dull or patchy coat, runny eyes or nose, or regular sneezing, fish could be a trigger allergen.

Observe your cat carefully when introducing fish to their diet, and consult your vet if you notice symptoms that may indicate an allergy.

2. Fish-Based Cat Foods: Safe When Complete and Balanced

For cats without fish allergies, feeding a complete cat food containing fish or fish flavouring is perfectly safe. These foods are formulated to meet all nutritional needs and balance fish content appropriately.

Beware of fish-flavoured products sold as treats or complementary foods rather than complete diets; these are richer in fish and should be given sparingly to avoid nutritional imbalances or excessive mineral intake.

3. Feeding Plain Fish as a Treat: How to Do It Safely

Small amounts of plain, cooked fish like sardines, trout, salmon, or herring can be a delightful occasional treat for your cat. Some oily fish high in omega-3 fatty acids support healthy skin and coat and may aid joint health.

When feeding plain fish:

• Ensure it is cooked plainly without added salt, seasoning, or oils, which can harm cats.
• Choose fish packed in natural juice or water, avoiding those in salted water or vegetable oils.
• Feed only in moderation to prevent excess intake of minerals like iodine that can impact thyroid and kidney function.

4. What Fish Lacks: The Nutritional Gaps

While fish is protein-rich, it lacks some essential vitamins cats need, most notably vitamins B1 (thiamine) and E. Regular feeding of fish alone can lead to deficiencies and associated health problems.

Additionally, fish may carry environmental contaminants depending on their source. Some fish harvested from polluted waters contain pollutants or antibiotics that can accumulate in your cat's system, posing long-term health risks.

5. Risks of Feeding Raw Fish to Cats

Raw fish can contain harmful bacteria and parasites. Feeding raw fish to cats requires rigorous hygiene, proper freezing, and handling to reduce risks of foodborne illnesses. Many vets recommend cooking fish lightly to eliminate these dangers.

If you choose raw fish, ensure you obtain it from reputable sources and follow strict food safety practices.

6. Best Fish Choices for Cats: What to Offer

Prioritise fish rich in omega-3 oils and low in toxins when giving treats, such as sardines, trout, salmon, herring, and mackerel. These provide beneficial nutrients while minimising exposure to harmful substances.

Avoid excessive feeding of tuna and cheap fish substitutes like Basa or river cobbler, which may accumulate more pollutants or antibiotics.

7. Summary: Feeding Fish Responsibly for Your Cat's Health

Feeding fish to your cat can be a good idea if done safely and in moderation. It offers tasty, high-quality protein and omega-3 fatty acids that support overall health. However, fish should never replace a complete, balanced cat diet.

Always introduce fish gradually, watch for allergic reactions, opt for cooked fish, and avoid overfeeding to prevent nutritional imbalances or toxin accumulation. Consult your vet if your cat has special health needs, such as kidney issues or allergies.

By following these guidelines, you can safely include fish treats that your cat will enjoy and benefit from without compromising their wellbeing.