Is there anything I can do about these idiots?

I agree with Dunfilly. There are horses that are a LOT worse off than these two. Buy them yourself if you are so concerned and cut the stud, and resell. There is no ASPCA here either and if I see something that is so disgusting to the point that I wish there was, I take it into my own hands. These two horses do not look bad off at all, while not in the most responsible of hands, they are not on death's bed.