I have 3 week old chicks from McMurry and I noticed today that some aren't doing as well as others. Not as well groomed etc. I pulled these chicks out and find that many of them have an apparent beak deformity. I assume it's cross beak. In the couple of chicks where it is really bad the bottom beak is pointing downwards almost completely. Is this cross bea or do I have another problem, possibly nutritional deficiancy?