I've had my Arab mare since she was born 21 years ago. My vet confirmed that she has cushings. She gets two flakes of grass hay in the morning and two flakes of alfalfa in the evening. She started losing weight, so in October I started giving her LMF Senior once a night after work. She is up to 6 lbs. per night with two tsp. of freshly ground Chaste berry. However, it doesn't seem to be helping. She's losing weight and muscle on her top line, but her ribs are not showing. My vet has suggested giving her Pergolide. If possible, I'd like to keep using holistic treatments, but I'm not against medication if she really needs it. Do you have any recommendations on what else I could give her, and how much? She has a very healthy apetite, so eating isn't a problem for her.