Can Cats Eat Canned Sardines?

Cats, being obligate carnivores, have a unique dietary requirement that leans heavily towards protein-rich foods. One question that often arises among cat owners is, “Can cats eat canned sardines?” The answer is yes, but with some important considerations.

Understanding Feline Nutrition

Cats require a diet rich in animal protein, taurine, arachidonic acid, and vitamin A, nutrients that are readily available in meat and fish. Unlike dogs and humans, cats are unable to synthesize these nutrients effectively, making them essential components of their diet.

The Role of Sardines

Sardines, a small, oily fish, are an excellent source of omega-3 fatty acids, protein, and several vitamins and minerals. They are known to support immune health, reduce inflammation, and promote cardiovascular health. However, the nutritional profile of sardines can vary based on whether they are fresh or canned, and what kind of liquid they are canned in.

Canned Sardines: A Closer Look

Canned sardines are often preserved in oils, sauces, or brine. While the fish itself is beneficial, these additives can pose health risks to cats. High sodium content in brine can lead to sodium ion poisoning, while certain oils and sauces may upset a cat’s stomach.

Therefore, if you choose to feed your cat canned sardines, opt for those canned in water without any added salt. It’s also crucial to offer sardines as a treat or supplement rather than a meal replacement, as they do not provide a complete and balanced diet for cats.

The Science Behind Feeding Sardines to Cats

A study published in the Journal of Nutrition found that cats fed a diet supplemented with fish oil had a higher metabolic rate and better overall health than those on a standard diet. Another study in the Journal of Veterinary Internal Medicine reported that omega-3 fatty acids found in fish oil could help manage chronic kidney disease in cats.

However, it’s important to note that while these studies highlight the benefits of fish oil, they do not specifically address feeding sardines to cats. More research is needed to fully understand the impact of sardines on feline health.

Potential Risks and Considerations

While sardines can offer health benefits, they also carry potential risks. Sardines are high in purines, which can lead to the formation of urinary stones in cats. Additionally, excessive fish in a cat’s diet can lead to a vitamin E deficiency, known as steatitis.

Moreover, canned sardines can contain harmful substances like mercury and BPA. Mercury can affect a cat’s nervous system, while BPA, a chemical used in making certain plastics, has been linked to various health issues.


In conclusion, while cats can eat canned sardines, they should be offered sparingly and with caution. Always choose sardines canned in water with no added salt, and consider the potential health risks associated with feeding fish to your cat. As always, it’s best to consult with your vet before making any significant changes to your cat’s diet.

Amelia Kteylor

Amelia Kteylor, DVM, attended the University of Georgia. She is a cat expert with 20 years of experiences in field. She has a passion as a writer and editor for pet publishing industry too. Amelia contributes to numerous pet magazines in the areas of pet health and groom. Further, she volunteered in cat rescue centers in her leisure time.

Recent Posts