Tuna Oil & Flaxseed Oil added. Tuna Oil and Flaxseed Oil are both rich in Omega-3 fatty acids which are essential for cats to maintaining healthy skin and fur. Omega-3 fatty acids have been shown to help to supports hydrating the skin also beneficial for maintaining a shiny, soft coat by increasing the production of natural oils in the skin. Natural Kitty Functional Creamy Treats is the best daily reward for your cats. You can feed your cats everyday with Natural Kitty as a reward or treat or feed as a light meal, or serve as main meal complementary.