I know this has been asked a thousand times, but I thought about it today when I was socializing with my chickens. I have 10 BOs, and there are a couple that are obviously bigger than the other 8. I have 9 RIRs and 1 or 2 of them are bigger than the other RIRs. I have 5 Silver Wyndottes and they are all relatively the same size. If each breed was born on the same day, should there be much of a difference in their size? Could this be an indication of their sex? They have all been together since I received them on the 3rd of December, they have been fed the same feed and water. Maybe they are like us and some just get bigger faster and they may not be from the same hen or rooster. They all appear healthy and active and all are eating and drinking.