i use MareMagic for my mare right now. it works really well
You’re welcome, I also use Regimate on my mares and it works really well!
Regimate should work. It stops heat cycles, so as long as you aren’t trying breed her they should be perfectly safe!
I use a supplement called 'No More Moods' from Equine America and it is really helping the hormone control of my mare!
It contains Chaste Berry, "a plant which has been recognised for many years for its benefits in supporting correct hormone levels".