Is there a lot of comb and wattle development? I find it amazing how varied the growth rates are in chickens. Mine are about 26 weeks and i have seen pics of much younger BO's that would shame my late bloomers...if they actually cared about such things.
One of my BO laid her first egg last Saturday. She was 23 1/2 weeks. I know it was her because she ran out of the coop and laid it at my feet, lol. She has laid and egg all but one day since. Her eggs are the biggest, about the size of a medium egg from the store and they are a pretty light rosy pink color.
My BOs are 25 weeks old tomorrow. One started laying last week and a second started laying this week. Still waiting for the other three to start. My BRs are also 25 weeks old. One started laying last week. Still waiting for the other two to start. The eggs are delicious!