Fish4Dogs Finest Sardine is the first of the Fish4Dogs complete foods that use sweet potato rather than potato, which is high in vitamin B6 helping reduce skin irritation, a great source of vitamin C and D which plays an important role in building healthy bones and development, and digestion. Sweet potato is also good source of iron for energy and supporting a healthy immune system. Fish4Dogs Finest Sardine Complete dog food contains a high fish content so is naturally rich in Omega 3, with no artificial ingredients or grain it is suitable for all adult dog breeds, great for shiny coats, healthy skins and supple joints.