I have an old English cockerel about 4 months old that over the past 4 days has become increasingly uncoordinated. This morning he was stumbling like a drunk. He is also more content to be held than usual and lays his head down on my hand . He lives with 4 2-month old silkie/serama chicks staying indoors at night and out in the garden during the day. I brought him in to live with these chicks when they were only a couple weeks old because he was doing very poor out in the chicken yard. I feed game bird chow and for the last couple weeks they have been getting 24% protein dumor chick feed. He was picking at himself a little yesterday but I could find no external parasites. Any ideas on what the problem is or treatments to try would be appreciated.