Soaking in Epsom salt, as you've been doing. If he fell and bruised himself, nothing can heal it but time. I've known a few chickens to hurt a leg, limp for a bit, and then go back to normal. That's if nothing is obviously broken. When I've had bumble foot, I've not cut the scab out. I found soaking in epsom salt and then applying neosporin without the pain med included, wrapping it up in vet wrap (or horse wrap) from tractor supply, and they are fine in a week or less. If his feet are just sensitive from being on carpet, time is the cure for that too. Got to build up some calluses.
