Inbreeding has been done alot in the past to "prefect" a breed. In ways this was good, in ways it was bad. Inbreeding is why so many dogs to day have the problems that they do (like big dogs being so prone to hip problems).
however, I would guess that the pups would be fine unless there was some recessive genetic trate that didn't show up in mom or the son (dad & 1/2 brother to the babies). And as long as the rest of the family tree doesn't go around and around in circles.
__________________ Anna  & Roxy  |