Originally Posted by My2Geldings
It's a sign of stress. Horses sweat like this when they get worked up. If you don't have problems with loading her, continuing to trailer should get her used to it more and calm her down
exactly. The more you trailer, the calmer the horse should get. It's not going to be an overnight fix. When I first bought Gangsta, he wouldn't load, and when he finally did, he'd come off the trailer drenched in sweat and lather. Now, he self-loads onto anything and everything, and doesn't break a sweat at all. I've also just gotten in a new one, Jasmine...who paws and kicks and sweats, and I've taken to giving her a trailer ride around the neighborhood (about 10 min) once a week. She's calming down more and more with each ride.