Hoping someone out there can help me. My horse lost hair on the center of his back this spring. I blamed my cat as she sleeps in that exact spot? The hair grew back but I rode him once and caused a sore spot. Then the hair came out again. I called the vet and she has no idea ? I rubber ivermectin on him in case it was mites or lice. I have him on Camelina (spelling) oil and protein pellets. I tied MTG but it almost made the hair loss grow? There Is a nice velvet covering but not totally covering skin. Does anyone have any ideas as to what could have occurred or how to get his hair to grow quicker.?