I'm sorry if this isn't the proper place to post this question. I would like to set some eggs from my little Belgian d'Uccle group as all of the hens have now started laying for the season. They run every day in a mixed flock with other breeds of roosters, along with the Belgain d'Uccle rooster. My question is, if I separate the breeding group off, at what point could I incubate the eggs without worrying about some other roosters genetic contribution? How long does it take to ensure that any sperm from any previous breeding is out of the system? Thanks!