I have a flock of chickens that are about 15 weeks old. There are 3 roos in this flock, who all get along very well (right now), since they were raised together from babies... However, I have five 6 week old chickens I just put in their own caged off section of the coop, to start the see, but don't touch introductions. I plan to leave them caged off for a couple of weeks, then let them free range together with the older chickens, before returning to the coop together at night. I noticed one of the little chickens developing 3 rows of comb (they are easter eggers), and believe it may be a roo. My question is... will the older roosters tolerate a younger one coming into the flock? Or will they just kill him, no matter how much introduction time they get? Thanks in advance.