Also poked around and noticed you also recently posted about mites. Mites cause dehydration and could have a lot to do with the shed problems, and until he has recovered from that, he is going to have a tough time. Given that is going on as well, it's not a bad idea to get him in, make sure he doesn't need IV fluids, because he very well could be severely dehydrated. There is no telling how long he has been battling the mites, wearing him down.