as a chick, I though both white one walked a little funny, but they still walked, so I thought it must have been just because they were so fat. I have heard of mareks and read up on it but her legs are not paralyzed. She seems good in health, although her underbelly is red and irritated, and dirty..again..even though I just bathed her... I have been doing physical therapy with her legs every day for the past week, she show some resistance, and she does move her legs while shes on her back. I also fed her some pulverized egg shells, quinoa, flax mixture for a few days but that didn't seem to help either. She is a sweet girl I don't want her suffering, I really want this fixed. none of the other chickens have this problem