Warning, it's a long story... Beginning of March my husband picked an EE chick out of the "Pan Fry" rooster bin at the feed store. I picked out 4 assorted bantams and 2 SLW from a pullet bin. Three months later 2 of the bantams are for sure cockerels and one of my SLW turned out to be a cockerel too. So we were looking at 4 roosters. Two months ago 3 started crowing but the EE didn't even have comb development though he strutted like he was king of the coop. I came to thinking maybe he's a late bloomer? We bought him as a rooster, right? Last month a 3 row comb started to develop, small but developed and bright waxy red. Woo-hoo he's starting to catch up finally after 5 months!!! Today I go out to the coop and there is a blue egg. I have a 4 month old EE pullet and think, is she laying already? Her comb is still slightly yellow, not bright waxy red. I pick her up and check her pelvic bones and vent... She's not laying, I am sure of it. I only have one other EE, the late blooming now developing cockerel. I check my SLW hen that I know is laying and make note of her features. I check my SLW rooster and make note of his features. I check my husbands EE cockerel and long behold I can fit 3 fingers between "his" pelvic bone and "he" has a large moist vent, similar to my laying SLW. Now here is my question; is there any sort of explanation for why SHE has a three row pea comb?