When I let out my barred rock rooster this morning he was acting like he was drunk and couldn't get his balance. His head and tail were down and his crow was really weak. I lost some hens last yr exhibiting similar symptoms and I thought maybe it was mareks but upon further research I am not sure if that's what I am dealing with. My rooster is over a yr old and until recently he has been fine. My birds get ground oats once per day and then they free range for the rest of the day will full run on my 10 acre farm. Help!