I have a 4 mo old legbar rooster. Last night I thought he looked a bit fluffed up but it was getting cold. He was moving fine. This morning I found him on the floor of the coop. He can't stand. He isn't moving his legs or wings, head is fine. eyes are bright, comb is red. He has a great appetite. Kind of rolls back on his hocks. He can move his head to get to the food, tries to move his body but can't. when I picked him up, his toes curled around my hand. I lost his hatchling sibling about 5 weeks ago, was sick one day and gone the next, but she didn't have any appetite and was hunched up. Not sure if this is related or not. I have given him polysci vitamins and he has eaten a whole egg. Now what?