My rooster is pretty bad. I came home today and found him laying in the middle of the yard. All the other chickens were already roosting for the night. My 3 other roosters are his sons and are 9 months old. none of the other roosters have any signs of fighting or injury, but I can't tell what else would have injured him like that. Both his eyes are swollen shut and his head is all bloody and had puncher marks all over. He has some bloody mucus in his nose and mouth. He lifted his head up to me when he heard my voice and attempted to move but he is really weak. I'm brought him inside and immediately cleaned him gently with warm water and set him up in a box with towels near our wood stove(our only source of heat). I'm not sure what else to do.