My five year old gelding is VERY reluctant to pick up his feet. When I try to pick them up I have to lean on him to shift his weight over just to make it a little easier. When I finally do get it up (which only happens about half the time), he tries to just lay down. He's an amazing horse other than that one thing. He's great to ride, but I can't ride him if I can't pick his feet out!! What can I do?