In the spring my gelding started hitching his left hind leg at the trot a little and at the canter a lot, he was also refusing his right lead. The vet checked him over and told us it was probably pulled tendons and ligaments. By mid August I was back to cantering him and he seemed perfect. Three (ish) weeks ago my barn manager told me he was rolling, tried to get up, fell, and was favoring his left hind. I didn't canter him for the rest of the week and the chiropractor came out two Wednesdays ago. After that he was really stiff. He was getting better so I tried to canter him but couldn't get his right lead. My trainer got on him and she got the lead, but he was holding it up and hopping. ANY IDEA WHAT THIS COULD BE? We are taking him to an equine hospital early next week and I am terrified he will have to be put down. He can still walk fine and only hitches it a little at a trot. PLEASE ANY IDEAS ARE APPRECIATED!!!!!