Our old mare with Cushings never got any better even with the Chaste Tree Berries. My DH spent many days cutting her long hair so that the hot days weren't so hard on her. But even with her hair cut she suffered in the heat. So we finally donated her to the Exotic Feline Rescue Center, who provide a home for nearly 200 big cats. They were thrilled to get her at the time because they were having a drought in meat donations. They said that they would be here in a couple of hours.
When he came to get her, he said that after my Husband had called they had gotten some other calls. They feed 3000 lbs. of meat per day. Unfortunately we have several horses who are at the age that they will probably end up in the same place in the next few months or years. It isn't as bad as it sounds, the man was very skilled in putting our mare down and he did it on our own property, so the horse does not have the stress of being loaded and hauled to a strange place. We feel like this is the right answer for all involved.