I have 2 EE's that will put thier head down and run backwards (usually about 5 or six steps, or until they fall down) usually shaking thier head. This is not something that happens often most of the time they act like everyone else, and ony one seems to do it more than the other. They are both about 10 months old, I bought them from a breeder on byc and hatched them out myself. I first noticed it when they were about 3 months old. The first time it was very windy and I thought the wind was knocking one off balance and was tripping backwards. Then when they did it again I thought it was a sneeze and maybe chickens get allergies. It doesn't seem to affect them. One of them is my Roo's favorite and when she starts to do it, he runs over and kind of pecks her on the head and she quits. Anyway I was on byc today looking out the window at them free ranging and one did it. So I thought I'd ask. Thanks