Hi Connie, We are with you! This is the most frustrating illness because nothing is set in concrete. Be very very glad that you found a vet who would at least read these posts and work with BET. That in itself is quite wonderful. I am not as experienced as some on this list but if it was me I would do the Thyrol for a couple of months first to see what happens. My vet recommended that for us years ago before a real diagnosis of my mare. He said "let's rule out the easy things to treat first before we tackle the hard ones". I was thankful for his advice but not for the way he put it! <G> Good luck- it sounds to me like your horses are lucky to have you!! Chris in CA (PS- where are you? it sounds gorgeous!)