Food & NutritionIs feeding my cat a fish-based diet long-term safe and healthy?
Hi there and thanks for posting on Petco Pet Education Center, formerly Petcoach!
Feeding a fish based commercial diet that is nutritionally complete is just fine as long as Cinderella is not allergic to the fish in the food you are giving. Cats that are fed raw fish frequently is more of the concern as they can develop serious nutritional deficits and vitamin deficiencies such as Thiamine deficiency which can be deadly. It is for this reason feeding raw fish primarily to cats is not recommended. However, feeding a small amount of tuna from a can occasionally as a treat is okay and will not cause a vitamin deficiency as long as they are also eating a commercially prepared food. No need to change the food Cinderella is enjoying now. From what you described, it sounds like she has tried a few foods that may have been giving her runny stools so if she is doing well on this particular food from Taste of the Wild, then I would keep her on that.
I hope this helps!
Updated on September 24th, 2025
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