One of my 3 week old Blk Cochins has a swollen neck that extends to from the front left to the back left. She looks like a hunchback. It feelsvery warm but not hot and soft. We recently moved all the chicks into their new area in the chicken house. Before that she was fine. she is eating, drinking and active and all the other chicks are fine. They have pine shavings for litter which is what I used before I moved them. I have tried to find info in my chicken books, but don't even know where to begin. Any help would be great.