I did call animal control, but they cannot do anything as he has food and water. Livestock are not required to have shelter or a specific pen size in WY.
I am going to watch for the owner and see if she will talk to me. I would like to know why she has him locked up like that. Then I would like to explain to her why it is so unhealthy for a young horse, to never get any exercise. I will do this in a constructive, non aggressive manner. Maybe she needs help with something. I do not know, but I know that going in guns blazing would not have been the right answer.
See, if nothing else, blogging helps me see when I am wrong. :)