the problem then lies in the bitch dont breed from her again try her litter sister or another,no one is saying both dogs are not 100% when line breeding you can sometimes have a dog or bitch that does not produce good pups sometimes its the gene of the individual thats why i have spent 17 years to get what i have, had a dog around 9 years ago his father and mother were one of the best i owned bitch produced some great pups first time i mated her, lost the father that season put her to the dog second mating 3 failed and 2 were bayers,tried the dogs brother the following year and had 5 of the 6