I had no clue how to phrase this question, or really how to ask it, so bear with me! My bantam sebright was broody last summer and she raised two chicks...she did a great job and as she is showing signs of going broody again, I am WAY EXCITED. I'm thinking of giving her some eggs from my Buff Orpington hen. I want the father to be my Lavender orpington roo. (Because you can never have enough orpingtons.) However, up until the last few weeks I had two other (mixed breed) roosters in with the hens too. I did not actually see the mixed breeds mate with my BO, but I figured it's a possibility. I had to take the mixed breed roosters out of my flock because they were fighting. So, my BO has been with my LO roo for several weeks without any other roos. How long until she has "clean slate", for lack of a better way to put it, to make sure her offspring are from my LO and not from my mixed breeds?