One of our young call duck hens walks backwards sometimes, kind of like doing the moonwalk. One time she also seemed to be moving her head and neck up and down while doing it. At first I thought it was part of her mating dance because when I witnessed it, she then immediately walked forward to a male and started bobbing her head up and down like the others do when trying to mate. But when my DH saw her tonight (his first time seeing it happen) he said she walked backwards like she was trying to back out of something. Is something wrong with her? She seems fine everywhere else. Is it something in the brain? Please help!