what are you back crossing to? And are you line breeding? I'd recomend it line breeding after you cull is the best way to get results fast. I'd recomend father x daughter and then take a daughter off that back to a male from the same cross that produced the hen that was taken to the father. I'm a big fan of line breeding my best results with my show/weight pull apbt's came from father x daughter and mother x son then taking offspring from those two broods together
Wow you line bred your apb's?? That is against all kennel rules. I am taking it that you couldn't sell them as show quality, or even breeding quality. One look at their pedigree would get some strange looks, and most likely have you branded a BYB. which is what registered dog breeders strive not to have connected with their names.
I can't imagine doing it with chickens either. It is just so wrong. Seems to me that would be like a man having a kid with his own daughter, his wife having a kid by his son and marrying the offspring together. Oh wait, I forgot that does happen down here in the south.
