I have three RIRs, two hens and a rooster. They're 8 - 9 months old. I took them from my sister's flock about a month ago. The rooster has been mating at least one of the hens (I can't tell them apart) for about a week. I feed them layer feed plus scratch and I let them play in the yard when I'm home. So far no eggs. My sister has hens from the same clutch that are laying. Is this unusual? To make matters worse, my daughter is getting eggs from much younger chickens and isn't shy about rubbing it in. Any suggestions?