I was told by L.D that the only time you should do a bro/sis breeding is if both the parents are no longer around, and ONLY if the Whole litter was game. Again it comes down to ones own experiences and results of said breedings. We all know that one of the main purposes of inbreeding is to keep or capture the quality caricture we are seeking to preserve. So I could see why L said what he said. What the late great Mr. Carver was trying to touch on I THINK with his statement is you will always get both the good and bad traits in lightning fast speed. If you are not extremely carefull, brutaly honest, and ruthless you can dig yoursellf a hole by locking in the bad traits just as easy as the good. This is were the study of genetics is imperative.JMO