A lot of breeders will do a second generation back cross, such as grand daughter to grandfather or grand daughter to a grandson of a certain stud or bitch but even that can be tricky. Doing a son to mother is asking for health problems in a litter. No line is without it's problems and crossing them that closely amplifies the problems.
Just as an aside the word bitch when used about a dog has no negative slang connotations. It's just what female dogs have been called since the middle ages. The actual, primary meaning of the word "bitch" was a female dog, or more generally a female canine (female wolf, female coyote, and so forth).
The origin of the term is apparently from old Norse, bikkja, or old German bekjon, through Old English, bicce, through Middle English, bicche, to the modern English spelling and pronunciation.
In various forms, then, this term for a female dog has been in use for over a thousand years.
Calling a human female a "bitch" is like calling a human male a "pig" which is also a perfectly acceptable term in the animal world but insulting when applied to a person.
Just as an aside the word bitch when used about a dog has no negative slang connotations. It's just what female dogs have been called since the middle ages. The actual, primary meaning of the word "bitch" was a female dog, or more generally a female canine (female wolf, female coyote, and so forth).
The origin of the term is apparently from old Norse, bikkja, or old German bekjon, through Old English, bicce, through Middle English, bicche, to the modern English spelling and pronunciation.
In various forms, then, this term for a female dog has been in use for over a thousand years.
Calling a human female a "bitch" is like calling a human male a "pig" which is also a perfectly acceptable term in the animal world but insulting when applied to a person.
Thank you so much for the heads up on this. Now I know that I shouldn't get one of those pups. I thought that it sounded funny when she said that she was going to breed the mom to her son. Also thanks for letting me know about the meaning so I can correct her. It's sad when one, a vet gets his info wrong and directs someone in the wrong direction. Two, when a breeder doesn't do there homework. 
