I have some month old lavender orpingtons and month old chocolate orpingtons. I would like to keep them separate most of the time for purebred babies. If I do let them free range together a few hours each day, roosters and all, will I still most likely get mostly purebred chicks? I know they will breed what is around them but if they are mostly just with the same color will I have much of a variation? Also...any help on what would be the result of a lavender rooster with a chocolate hen? I know the chocolate rooster with lavender hen will result in chocolate males but black females.