2 days ago one of my hens was acting weird. She seemed like she was egg bound by the way she was standing. I checked and didn't feel anything. I put her in warm water for awhile and massaged her vent, still nothing. I figured I would keep her inside so I could keep an eye on her. Next day, she was hobbling on one leg. I'd had a hen previously who had hurt a leg flying off the roost so I thought maybe that was it. Later yesterday, she wouldn't/couldn't stand at all. Today it's almost like she is paralyzed (legs). She curls her toes on one foot, but not the other. She is only drinking a little and not eating. Otherwise, her comb looks good and her eyes look fine. I don't feel or see any cysts or obvious injuries. She does not have mites or worms. She is still feisty when I pick her up and can move all other parts of her body fine. I have no idea what is wrong. Ideas?