We have an Amerucana Pullet (about 6 months) who takes about three steps, then sits down. Her steps are kind of pigeon-toed and unsure. She is eating, drinking, pooping normal (poo is large and solid, pretty healthy looking). Right now she's away from the rest of her flock, recuping in a medium size dog crate. We checked her for egg-bound the other day but didn't feel anything. Any ideas on what's going on?