As long as you have a barrel of water in your yard and you cull without hesitation, it will work.
This natural selection will take place in the kennel long before the dog goes to ground.
The expert said it was wrong, not that it would not work.
Without doubt severely undershot is not a hinderence in the field.
But you have to question your motives before you go down the road of inbreeding.
After a couple of litters of russion roulette, you will still have to outcross.
This is a topic that will always cause division.
If inbreeding has worked for you, great,
JMHO
p3d, i woul