My chicken will not leave the nest and she is not laying. I have 15 hens total and they are all 6 months old now. She is the smallest and has had past problems with other hens pecking her feathers out. She is a Columbian Wyandotte. I noticed yesterday that her comb is gone, she didn't have much of one anyway but it is entirely gone now. I have been holding her and petting her. I take her out of the nest and walk around with her then put her in the yard to peck at the bugs and grass, which she loves. I haven't noticed the other hens bothering her, but I can't watch her continuously.