I have a 9 year old tb gelding who is a very gentle boy. He is the most submissive horse we have in the pasture and is at the bottom of the totem pole. We'be brought in a few new horses and he is being picked on fairly bad on a daily basis. We only get to see our horses maybe once a week, and it's been about a 2-3 weeks since we noticed a different horse. He seems to be very, almost depressed. He just kind of hangs his head and stands at the back of the pack. He does still get very excited when he sees us and loves getting to go out riding. We let him stand for 2-3 weeks due to a bite he had on his side where the saddle pad corner would rub. Last night we took him out and brushed him and noticed all his bald spots where getting bigger and he was losing more hair. His skin is scabby or hard, it just looks like he is hair is falling out for no reason. Originally we though the other horses were scraping the hair off with their teeth when they would fight, but now we can physically see the hair falling out. He's always had some spots where hair just never grew on his hind end and around his hip bones. Any ideas on what it could be?