I have my coop divided in half right now, I have the 3 week old chicks in their own pen till they are big enough to defend off the adult flock. I went to go refill the water dish in the 3 week pen and when I came back the big girls were in with the little one eating their food. The main feeder for the flock is full there were no other hens feeding so its not like there was competition for the feeder. Do they some how know the difference between layer mash and starter/grower?