We have a week old Bantam chick that we bought last Friday, she was fine for the first day when we brought her and 2 of her sisters home. The next day she started doing somersaults and falling over when falling asleep. We put her in a shoe box and kept her under a heat lamp by the bed and she seemed better in the morning. She is eating and drinking just fine, but still goes into these fits. It is like she is having a seziure. Is this normal?