I don't think so. I was just saying that he might have untied himself, but as I read further down the thread I see that he didn't. Comment withdrawn.
I actually dislike old westerns because of the intentional cruelty and wasteful damage to horses in old films before oversight by humane organizations.... But I think for the most part, treatment and methods have improved, to the benefit of both the animals and the films.
But it'd be silly to pretend that it isn't still dangerous, and those overseeing the treatment of the animals on set have to always balance that. Good horsemanship can make it saf-er.... never pretend it will ever be completely safe.