As a general rule, no, you don't want to mate brother and sister... but if the parents were unrelated to each other and they are all you have to work with right now, it is a personal choice... I would only try it once if needed though...
Linebreeding is different... yes, breeding the pullets back to their father is acceptable, or breeding the cockerel back to the mother... it will strengthen the good points and the bad in your line... bringing in new blood can be very good or very bad... new blood refreshes your genetic strength and can bring in desirable traits or it could bring in undesirable traits... just depends on if your needs outweigh the issues...
Breeding will always take time, patience and lots of generations... this breed more so than most, lol...![]()
well, the breeder has 3 roos with hens, so I am just guessing that they are brother and sisters. but I definitively don't want inbreeding. their parents might be brother and sister as well.