two hens jump off the roost when i go in.... should I leave him with some bedding and food and water down there?
Unless you have a heat lamp on him, I would not leave him down on the floor of the coop by himself. If no hen is sitting on him to keep him warm, he will get too cold and die. Do you have an area you could keep him in with a heat lamp or higher watt light bulb? It is strange that a few of the hens jump up when you come In....you may want to go out with a flash flight and investigate your hen’s nests to see if you can locate where it came from and make sure there are no other little ones hidden somewhere!