We have 3 hens for the past year. Delighted with them. But recently one of them has been walking strangely. Her feet are fine. It's as if she's walking with her shoulder forward, and kind of 'backing off' or walking slightly sideways. If she were a human you would think she was backing off from a predator. I don't notice the other 2 hens pecking her or anything. DH said she couldn't find her way out of the henhouse this morning. She is moulting at the moment. We don't know if she's laying. Eating and drinking fine.
What could it be? Should I be worried? Should I do something?