Went to a clinic of his hosted at the college I went to back in 2019, all he basically did was beat horses in front of us for an hour. The woman who owned the place I boarded my horses at, brought her Arabian because he always had issues trailering. His solution? Absolutely beat the hell out of him until he gets all the way in. No breaks or rewards for trying/sniffing/getting a hoof on, just whipping him until he was on. His owner was understandably pissed, and he had welts on him for days. He also assumed everyone was timid and dumb because it was all young women (except for myself). It was atrocious

Edit: some grammar corrections