I have 4 hens that live by themselves and a rooster that lives with my goat. originally i didn't put them together because in the past when i had chickens the rooster tore them up. The rooster i have now is pretty friendly and the four hens are laying eggs. I would like to raise chicks by spring and am wondering the best way to introduce them? The hens are about 1 1/2 years old. Also would it possibly make the rooster mean and is it a bad idea since i only have four hens?