I'm seriously considering purchasing a horse in the very near future. I've seen him and plan on seeing him again. He's sweet as can be and just beautiful. He's 6 years old. When he was 3, he slipped on a patch of ice and fractured his hip. He has since fully healed and been cleared by the vet for light to moderate riding (basically, he's perfectly rideable, but extensive hills, long distances, etc. make him a little stiff). He has a little bit of a hitch in his step on one hind leg, but he's in zero pain. What I'm wondering is, would it be beneficial to put him on a joint supplement if I do purchase him? If so, what do you recommend?