I have a Jersey Giant hen that has started "Marching" around the property. She does not change stride at all and when she runs it is the funniest thing I have seen a chicken do BUT ... My concern is that she may be sick or have some parasite in the nervous system that is causing this. I have had her about 1.5 years and she has been marching for the last 4 months or so. She eats well, seems to get around fine and lays eggs like a good girl. The march consists of throwing each leg straight out and stomping down like you see in the old war documentaries. We have 45 chickens total and none of the others act like this. They all free range.