Just because a dog is good doesn't mean it will throw good genes ... and the last part = the strength of family breeding.
Absolutely false.
Have you ever heard of recessive genes? Just because a dog doesn't "physically express" the trait itself, doesn't mean the trait isn't present, nor does it mean the trait can't be passed on ...
Little Tater was an average plug, yet he threw the great Gr Ch Buck.
Awesome Baby was a cold, useless bitch ... and yet she out-produced every single Champion bitch in the history of the sport, except Honeybunch, and Awesome Baby was not bred as much as Honeybunch.
True. And that works both ways.
Me personally, if I don't know shit about the blood, then I won't breed to that dog AT ALL ... regardless if he's good or bad.
Dogs that can fight are a dime a dozen. Dogs that can produce prepotently, and transgenerationally, are much rarer. There are a HELLUVA lot more Champions than there are ROMs ... let alone dogs that are prepotent enough to form core foundation stock ...
Only if I know the blood (or, at least, the percentage/styles of the animal itself, plus its littermates), and know that these dogs are truly strong genetically, would I ever consider adding that blood to what I am feeding.
Jack