I noticed my hen has started to walk backwards particularly after eating. She walks, runs and flies great and is still just as coordinated as far as I can tell other than this odd behavior after/while eating. My first thought was some sort of crop issue because it starts after she eats but after reading another post on a different forum they suggested this behavior could be due to swelling such as after trauma. About 1.5 months ago I noticed a fair sized laceration on her scalp which I sutured closed and placed antibiotic ointment on and it has since healed well - I cannot find the thread however to remove the sutures. Could this me the underlying cause? I only have 2 hens who are exposed to wild birds to an extent while free ranging. The effected hen is currently broody sitting on 6 fertile eggs and is eating and drinking when she takes her daily short break from brooding. My hen's behavior looks very much like this: except that she doesn't go as far back or as fast when walking backwards, she also tucks her head to the left typically. Mostly I want to know if a viral cause is unlikely such as that of Marek's disease or Newcastle as I have new chicks i plan to be introducing to the flock.