I was wondering if perhaps he'd been dumped out of a moving car, but your later posts indicated that to not be an issue. Have you had an opportunity to check his feet closely?
Hello Lazy Gardener! I gave him a bath last night which he was really good about despite my inexperience with handling such a large rooster and he's been letting me get closer to him and touching him more during the days. He's not the least bit aggressive but still very cautious. I have started a thread about his recovery and someone mentioned there that the red in his legs is hormone related. He's moving around much better but I still haven't been able to hold his feet still to see them well. I think it'll be something we'll have to work up to.