My sister has 3 hens and just got 12 chicks. She doesn't want her hens anymore and wants to give them to me. I have 3 hens that I have had for 3 years. Her hens have missing feathers, one has a bare butt and they just don't look that good. Mine are robust and healthy and get along great. Should I even take her hens? I don't want to put my hens at risk. I read somewhere that you should just put the new hens in while the others are sleeping. Is that correct? Should I keep them separated for a while? Any advice would be greatly appreciated as she wants me to pick them up tomorrow.