I have a pair that have been together their entire 3 year life. One is IB male and the other a BS hen. They seem to be with each other most of the time. I now have acquired a Emerald pied spaulding male and a IB hen (both about 3 years old). I want the 2 IB to mate and the BS and pied to mate. Will I have a problem if I put each pair in separate pens and when should I separate them. Would May 1 be early enough?