Derma Strength Skin and Coat Support is formulated with Omega?s 3, 6 and 9 to promote healthy skin, normal shedding and may alleviate discomfort from dry or itchy skin. With added Salmon Oil and Vitamin E, Derma Strength helps keep your dog's coat healthy, shiny and full. Derma Strength is veterinarian formulated and approved by our veterinary review board. VetriScience products are manufactured in the U.S.A. and are backed by a 100% Satisfaction Guarantee.