I love the slick n' easy blocks. Besides lots of good grooming to make his coat shiny, I use a moisturizer that you mix with water and spray is all over my mare. I think it's just called Hair Mositurizer. You can find it online and in tack shops. It works very well to bring out the shine. As far as supplements go, I have heard good things about Sho-Glo, which is supposed to be for the coat. I just started using the Sho-Flex because I want to protect her joints and the Sho-Flex has Sho-Glo in it as well.