I had BC Marans and Splash Marans all living in the same coop til a week ago when I put each breed in their own pens. Up til that point they had all been comingling including the roosters. How long until the old Roosters sperm will be overtaken by the new roosters. In other words I know the hens have a storage area for sperm that can live up to 3 weeks. If the new rooster is making fresh donations to the hen will that overtake the old ones or do I need to wait the 3 weeks to be sure. I would like to be able to start collecting eggs to incubate but dont want to end up with them mixed breed.