I have a one week old brahma chick that seemed to be doing okay other than being a little spraddle legged. I treated the spraddle legs and put her in with a buddy and she did okay from hatching until now. I went to check on her today and she is flipped upside down shaking and twitching. I am not sure what to do. She seems to be breathing okay but can't walk or move at all. She just flips her head backwards and lays on her back with her legs stretched out and tense. Any ideas what it might be.