My trainer/barn owner mentioned last week that it was good to see his hind legs without "all that swelling". I didn't realize he usually had swelling. So I looked at it "without" to make a note of it, and then I looked today and yes, I could tell, his hind legs had some swelling in them (the joint above his hooves and up to the big joint that is like an ankle only 3 feet above the ground). I talked to my trainer and she said, yes, that's how they usually look, they just didn't look that way on Friday. She thinks it is maybe because I free-lunged him (I think that is the term) in the paddock before I brought him in to groom him up before riding.
Right now, he is in his stall at night, and he gets turned out in the morning, usually first-thing after everyone gets their grain and Round One of hay flakes. He totally trashes his bedding every night, so he's usually one of the first horses turned out. :) He's in a paddock with a buddy all day and then comes back in to the barn in the evening. Vet gave him a body-condition score of 6, and he's getting low-carb grain pellets and mostly hay. I also give him a senior joint supplement with glucosamine, chondroitin, MSM, and some other goodies (Senior Flex) and an omega-3 supplement because he doesn't get to eat much fresh grass. As long as the weather permits (it is not actively raining, the ring is not flooded, there is not a layer of ice on the ground) he gets worked 4 or 5 times per week.
My trainer said this is just what happens when a horse gets his legs pounded to bits by a high-jumping career, and she thinks I am doing everything I could or should about his hind-leg edema, but I wanted to throw it out there in case anyone can think of something else I ought to be doing. I know when my joints puff up it is kind of uncomfortable, and I want to take the best care of him that I can.