i would say that 80 percent of pups don't turn out i would personally never own a pup because of exactully what happened to u i have raised pups out of top dogs before and out of 9 pups one made a decient dog
If you're consistently getting a 20% turn out rate, you're breeding the wrong dogs, I don't care how good the individual dogs are. Those 2 top dogs that only 1 of 9 pups made a decent dog...I'd say the 2 dogs bred were most likely scatterbred. There's quite a bit more to producing quality dogs than just putting 2 top dogs together.