Natural sardines are a valuable source of omega-3 fatty acids, such as EPA and DHA, essential for your cat's health. They promote brain development, maintain healthy skin and a shiny coat, and aid in the anti-inflammatory response. Cats need animal-derived omega-3s, as they cannot properly convert those from plant sources. In addition, sardines provide vitamins A, B2, B3, and B12, as well as easily digestible minerals and calcium.