I have one horse with insulin resistance and one with Equine Metabolic Syndrome, a/k/a peripheral cushings.
Both are on chastree. It really helps the EMS horse.
Not so much the IR horse but chastetree, AND a grazing muzzle, do help him some. Winter time is his best friend
My friend's Paso Fino was cushings and IR. She managed him the first several years with just chastetree but the cushings really accelerated the last 18 months of his life and she ended up putting him on Pergolide.
I have also heard of some cushings success with Chia Seeds. There's an equine Chia seed website that talks about them. Holistic Horsekeeping Store
However, if you decide to buy them, go to a human Chia seed website. They're are MUCH cheaper plus you can eat them too
I think this is the cheaper web site. Chia Seeds Products | Chia Seeds Health Benefits I also feed the chia seeds to my IR horse and I have noticed two things:
1. His "peeper" is a lot cleaner since he's been on them.
2. He's always been such a sweat hog that he would foam up around the muzzle and face mask. He doesn't do that anymore.
I was feeding him 1/3rd measure cup but cut that in half because, while he WAS sweating too much, I don't want him heading for anhidrosis (sp?) either.
One half of a 1/3 cup seems to work as he still sweats more than any of my other horses but isn't the foamy mess he used to be.
I apologize if this sounds sketchy, I need to get to the barn; Mr. WTW is already down there and probably "Two-Steppin' Around" pretty good because I'm sitting here trying to get this typed
Hope this helps