I'm using the Cushing-S on my gelding Domino, who was no longer responding to his high dose of pergolide.
His labs all improved to near normal levels, and we even took him off his thyroid med.
He's mid 20's and we still do light riding three days week.
The barn where I board was so impressed with Domino's progress, they are trying the Cushing-S on one of their therapy horses!
Thanks for all your help!