I have 3 pullets almost 8 weeks and a little roo the same age. We also had a Gold laced Wyandotte but she died the next day. My husband wants to get a silkie for my niece to keep here so when she visits she'll have one to call her own. My question is at what age do the ones I have need to be to introduce another one in and what age should the new one be. My babies are already outside in their new coop.