WRY mouth - genetic
Adult Canine Dentition Chart
you can see that the skull is divided into a left and right side.
Sometimes in development one side grows out of synch and eventually
the opposite side catches up . Sometimes NOT.
Sometimes the top and lower jaw grow out of synch and you may
have a temporary undershot or overshot , which eventually corrects
itself when all parts (4 parts to the skull) catch up .
This is genetic.
We had a crazy breeder in our area ,who had many pups with WRY mouth .
I found out because our phone numbers were almost the same with one number
being different so I got a lot of calls intended for her. It got to the point where
I would take down the callers number and connect them to another owner with
the same problem . The vet knew about it.
She would guilt the people making them think they were to blame, accusing them of
slamming the dog into a wall or some such.
Some of these dogs were pretty severe in their malocclusion.