Optima 365 Dog, 16 oz (1010813)
Optima 365 for Dogs, 16 oz contains an essential 7.7:1 ratio of omega-6 and 3 fatty acids to improve the health of your dog's skin and coat. Optima 365 supplements also contain vitamins A and E and antioxidants reduce dander and excessive shedding.
Does what it says and doesn't cost much. I did not see any huge difference, though.