Father and daughter dogs can be bred together. This practice is called inbreeding. Inbreeding is practiced when the breeder wants to produce dogs that are practically identical to one particular dog, in this case the father.
If a breeder locates a male dog that he considers to be an ideal specimen, breeding the daughters back to the father produces pups that are 75 percent genetically identical to the father. Breeding these daughters/granddaughters back to the sire again further increases the genetic influence of that particular male on the resulting progeny. Inbreeding can quickly create a strain of dogs that breeds true for particular desirable traits. It can also quickly reveal recessive genetic traits that can cause birth defects and diseases.