I have a seven year old gelding that I bought as a performance show horse. He had a very quick and tight gait when I bought him but in the past year he has started pacing more and more. I took a year off of showing and want to start again but I cannot get him to stop pacing. He starts out good but quickly deteriorates into a pace. I have gone back to the basics with ground work and flexing. I haven't changed any of his tack. I don't know what to do anymore. Any suggestions?