Most people think “cats love fish so it must be right for them,” but here’s what’s actually true: preference doesn’t equal biological suitability, and fish isn’t a natural foundation for a feline diet. Cats are hunters built for land-based prey, and their bodies are designed to thrive on fresh meats that mirror what they would naturally catch. Fish can be offered as an occasional treat, but it should never be the main protein source in a cat’s diet. Some raw fish contains thiaminase, an enzyme t