There is a link to ABC in our groups links section. A word of caution on the free choice system though. A couple of people in another e-group I belong to had problems when their horse ate too much of some of the products. So only put out small amounts at a time if you go with it. Alice Stevens is the resident "Cushings " person there to talk to. You may also want to contact Linsey McLean at Vita Royal, also in our links section. Both companies are doing Cushings trials and you may be able to get supplements at no cost. Mary G.