My hen started to stumble over a month ago, I thought nothing of it. In the last few days she is falling over and is trying not to use her right leg. I brought her home and checked her over, no signs of injury. But I did find she had been infested in lice. I have now got on top of that and fingers crossed they have gone. I think she was so bad as she isn't cleaning her self. Started giving her vitamins two days ago. Also treating her for scaly leg mite as they are a little scaly, none of the other hens display Any of the symptoms. She is still eating and drinking.