I have a white beared Silkie hen. Approx. 1 year old. She was fine last night but when I went out to feed this morning, she won't (can't) walk correctly...sitting on her butt and only walking, pushing herself backwards. Never forwards. She is eating and I have her in the house right now, but don't know what else to do...please any suggestions would be appreciated. She was my first Silkie and is extra sweet and special. thanks in advance.