That is never wise in any breed. Some breeders in the past have done it to strengthen qualities they found desirable in the father. However, if the father had passed a recessive trait for a genetic defect (say blindness) their pups would have a much greater chance of exhibiting that trait. This is what is meant by a smaller gene pool. Always look for a non-related, healthy male.
Answered by lmontague - 12/14/2013 6:48:24 AM