I have a 8 week old BSL who has been healthy, until last week. I noticed first that she was dragging her right leg. She would topple over and couldn't seem to balance. At first I thought she had an injury. Cannot feel any breaks in that leg and she doesn't act like it hurts (not that I would know how the chick would act if it hurt?). Then she pretty much stopped walking all together and now she lays with both of her legs behind her, but she was able to scoot to her food and water. Now she pretty much just stays in the same position and cannot scoot at all. I know I waited probably longer than I should have to intervene and try to help but I kinda hoped at first she had a sprain or something. She is still very alert and if I put food and water in front of her she has a very healthy appetite. She does not have a messy backside like she has diahrea or anything. I went to the local feed store and they called a hatchery who thinks she might have a vitamin deficiency? I bought some vitamins for her water and bought a 23% medicated feed instead of her 20% that she had been getting. I have separated her from the flock and brought her inside to keep a closer eye on her. None of my other birds have any symptoms whatsoever. But does anyone else have any better guesses as to what is going on or what else I can be doing? Any input is greatly appreciated!