I have a 5 year old horse, he is green according to the previous owner and I can see why. But his canter seems funky to me. It's like he hops and just is not comfortable. I've been riding 14 years and never experienced it, so I'm clueless as to what to do. I ride him in a dee ring snaffle as the previous owner said he used. Do I need to warm him up more or what?