I've got a 7yr old gelding that bites at his shoulders all the time. None of the other horses he is with do this. I spray him with fly spray and doctor his bites with antibiotic, but he still does it. I've even seen him do it when there was no fly on him. Flies were bad earlier in the year, but as dry as it has been they really aren't bad at all. The fly spray seems to work ok, but I just can't get him to quit this behavior. He also will kick at flies on his belly with his back feet and this too has caused bare spots. It breaks my heart because he's got a chance at a beautiful coat if he would just quit biting. Any advice you can give is greatly appreciated. Thanks.