Just seperated him 2 days ago, moving him into a chicken tractor by himself. He was one of 2 roosters with 18 hens. The hens were being roughed up too much. I kept him in a cage overnight then yesterday moved him out to the house. Last night when I went to put him up, he didn't get on the roost, but stayed on the ground. He also hadn't touched his food. This morning, he was crouched in the corner, so I lifted him up onto the ground and he kinda fell backwards, kinda off balance with his head rolled back and moving it from side to side. after an hour or two, we brought a hen to him. He's holding his head up now and looks alert, but is still setting in the same place and isn't drinking or eating the food/water I put beside him.