I have four white leghorns that are between 6-7 months old. When I got them at about 4 months old they were all the same size and had smaller dark pink combs. Three of them have been laying for a month and a half, the other is still not ready. Her comb looks a little bigger and red but still alot smaller then the others. She is very healthy and active looking, eats and drinks well. I'm not sure what is going on with her, let me know if this is normal for some to develop slower then others, or if you need any other info too figure this problem out. Thanks in advance for any help.