I have just 'aquired' 2 Roo chicks. I've had them from 2 weeks of age after their unwantedness along with 3 of their sisters became apparant and I didn't want them to be killed, eaten or battery farmed. So, they will be being blended into my current setting of a flock of 5 older girls. I am sure I am going to be returning to this now bookmarked article in the coming weeks that they become fertile!!