I have a 3.5-4 year old Black Copper Marans rooster that was the head honcho for a long time. About a month ago a much smaller and younger leghorn started chasing him off. Around this time I noticed he had lost a lot of weight in the chest and was acting uncoordinated. I found him just sitting around a lot during the day and roosting weird places. I put him in a large cage about a week ago with constant water and food so he would not bave to fight the leghorn. Now he barely stands. We does does he walks around like he's drunk and stumbles. His head is frequently cocked over at a weird angle and he spastically shakes it around. Even eating food out of a bole seems to require more coordination that he can manage. Any ideas? I have a video but it won't let me post it.