Well, trimmer came today and cleaned everything up. When she got done, we took him into the indoor and trotted him on the longe. He appeared dead lame. We took the horse 100 yards out to a grass field and he immediately picked up a fantastic forward trot and then burst into a canter that would knock your socks off. I then put his boots on and re-tried the indoor ring. It was better, but nothing like the grass. I got on him and he wasn't interested in moving around much at all. I am scratching my head. Sand is soft...grass is soft. What in the world am I missing? What is the difference between these two surfaces that creates such a varied response from my horse? He is completely sound on concrete and pavement, so I know hard surface is not the problem. Does the sand moving around down there really feel that weird to them? Not two weeks ago, I rode him in this same indoor arena and he was moving so well, he looked like he was putting on a clinic. I'm scratching my head big time here.
He was a bit stiff in his hind legs today, so Lyme suspicions are starting to creep into this equation.
You just have to see your distance...you don't have to like it.