My daughter received 41 three day-old pullets from a hatchery. From the first day she received them, one pullet, a Blue Laced Red Wyandotte, was much smaller than the rest and seemed slow or "off". She didn't have much balance and wasn't feathering out very much. I took her because the others tended to step on her and she was so much smaller. Her neck had a lump on it, I have never seen a lump on the side of the neck, but because it would get huge after she ate, I figured it was her crop. It doesn't do it now. She is now 9 weeks, small, and is still not totally feathered out. She has a good appetite and drinks water. She is a little off balance standing, walks in circles to the right, and lays down the majority of time. I am wondering if it could be Mereks, and she is recovering, or a defect she was born with. I have her isolated from my hens. All opinions welcomed.