At about what age do they start crowing? I have a RIR & a BR that are about 3 months old.. Also, when do young hens start laying also.. We had the windows up in the coop one night and I came back in the morning, and sitting there it looked like a soft egg was sitting there and it had been cracked open already. Also, the chicks like sleeping in the windows.. I guess that's why there was a egg there,lol. So they are the only ones that can fit up there. The baby hens are all about 3 months old.