Eukanuba Yorkshire Terrier Formula Dry Dog Food Real chicken as the #1 ingredient provides an excellent source of protein. Advanced Skin and Coat Care: Provides omega-3 fatty acids, Zinc and Copper for healthy skin and coat. These nutrients also help support the immune system and nervous system. Made with antioxidants such as vitamin E to support your dog's immune system. 100% Nutrition, 0% Filler. No artificial flavors or colors.