Line breeding ?

Here it is put simply...

Linebreeding shouldn't be used to change the dogs traits as much as to breed more consistant dogs like the ones you start with.
No one should ever start with less than near-perfect dogs and expect to greatly refine the offspring through linebreeding.

A solid family of linebred, homozygous dogs cannot be obtained with only a few generations of breeding.

People are often quick to breed two somehow related dogs and call the offspring "linebred" dogs.

Standout, superstar type dogs which stand head and shoulders above the rest rarely occur in linebred families.