You know, the OP hasn’t even said HOW her horse is lame, just that it IS lame, and she actually has every excuse in the book for not having a vet look at the horse. OP, why are you sitting on a BB talking circles around your problem instead of calling the vet? And I don’t buy that excuse that there are no good horse vets in your part of Montana. Post where you are, so COTHers can see if any of them know a good lameness vet who will see you. You might have to trailer your horse to their clinic, but there’s really no excuse that he can’t be seen. And if you can’t afford that, why do you even have a horse?
And Rustbreeches? You’re just capitalizing on the problem, here. She doesn’t need another horse, she needs to take care of the one she has.