Update!!!!
guys I think he has started to feel at home. More energy, moving around more, eating more. He is now resting the left and right rear leg, not just the right.
And---- don't know how to explain it---- he is being a little more tempermental. Kind of like a kid pushing the limits.
For instance---
Yesterday, I was brushing the mud out of his coat, I gave him a good going over. He had decided to lay down in a mud puddle so his hips, belly, flanks and ribs were all deeply incrusted with mud. I got the mud off of everywhere, but when I got around to brushing it out of his flank, he reacted. Had the rope halter and lead rope on him and I had the lead rope tied off long and loosely to the gate. I was bent over brushing his nether regions when my hat just flew off my head. Happened so fast I really had to stop and think about what happened, then I said nah couldn't have. I know horses are sensitive in this area, but this isn't the first time I brushed him and he had never reacted before. I put my hat back on my head, went back at it again with one eye watching him. Sure enough soon as I bent over, he turned and snatched my hat right off my head. I picked my hat up put it back on my head, scolded him, gave him a poke in the ribs with my thumb, he did not like being talked to in loud voice, his ears pinned back. Then I tied him up close to the gate on a short lead. Evidently once I gave him the idea that I was not to be fooled with he submitted, stood still and allowed me to finish brushing. I did use a little more caution when brushing around "the back of his underside".
I brushed him again yesterday afternoon. He was still pretty clean, but I kind of needed some relax- downtime- ctrl/alt/del-reset time. You guys know what I mean, turn brain off, just do something for the sake of enjoying it. Any how I gave him a brushing in his stall, no halter or lead rope on him, he stood, relaxed, and no "reaction" at all. Maybe he just had to give me a "try".