we got 7 chicks in April(leghorns) and 26 more chicks (mixed) there all females. With only being about 5 weeks different I want to mix them in about a month so the little ones are going to be about the same size as the other 7. Both groups are in different building and have never seen each other. My question is do you think there will be any problems? And if so what can I do ahead of time to make it easier on all of them?