Micrognathia
Short jaw than normal.

Appears at: ?
Affects game play: Breathing problems. Higher change on failler by hunting, patrolling, playing(as cub). Buldogs have also problems breathing because of ther short moulth.
Lethal: no


Prognathism
Longer jaw than normal.

Appears at: ?
Affects game play: no
Lethal: no


Just for extra info, the next pic is a normal jaw lengh with dogs. By dogs is indeed a genetic breedable. In the beginning before we bred our dogs, mutations also came in those dogs, as humans we decided what we liked and made sure we bred those we liked. Without those early and small mutations we never could have made all those different kinds of dogs.