Brandy never had an under bite at all... but Abigail she has a definite under bite ..its kind a cute... Abigails bottom jaw extends out about 1/4 inch or so more than her top jaw. It's not really noticeable unless you get up close and personable. She's 22 weeks old weighs in at 33 lbs. Does anyone have any thoughts on this... could it be a problem? Do they get worse? Thought I would ask..