Seriously ya'll. Slow your roles. Yes this is an internet board and YES your entitled to your opinion but come the heck on. Common RESPECT goes a very, very long way. There is absolutely no need to belittle someone who asked a question. OP there is nothing wrong with your question, ask away. Responses like this encourage people not to ask questions here. Your right, it could be a hundred other things from saddle fit to holes in training. But the former owner could be a liar too for all we know who unloaded a problem horse onto the OP. Stop jumping to conclusions and pointing fingers. Sorry OP I am not aware of your current rider status but that's because I don't live on this board nor do I care to. I'm not going to run to search and read everything you've ever posted because even if I did that won't change your course of action. It does sound like you did some questioning when seeking this horse out, and having a vet come out was a good starter item to check off the list. I am sorry for the rudeness that seems to hang over this board now-a-days. And your obviously realizing you have a situation you need to handle here, my advice of an outside trainer remains. Keep us updated, with seeking out some experienced horse trainers and ruling out some common issues like saddle fit, your sure to sort it out.