I have one chick from my MM order that has literally not grown AT ALL. She is now 19 days old and is the exact same size as the day old chicks I just got yesterday from my local feed store. I believe that she is my Golden Penciled Hamburg. She does NOT have any of the "mystery illness" symptoms (although I do have 10 chicks, out of 18, with the strange symptoms), but her small size concerns me. Any thoughts on this? I am going to try and include a piture of her if I can figure it out. If it works, she is the one on the right. You can see that she has her wing feathers, but she is no bigger than the surrounding day old chicks.