I have 8 hens who are 8 months old. Today I couldn't resist getting 2 more, 2 or 3- day old Ameraucana chicks. I was told I could put them with the older hens when they get to be about 2 or 3 months. Does that sound about right? I read somewhere, I think I recall, that if you add hens to an existing flock it's good to sneak them in at night, placing them on the roost with the others, so the others might not notice (silly hens!). Anyone tried this? Does that work?