It is possible 
that you little one just can't chew as well as is needed and it MIGHT 
be possible that the upper portion of the throat is a bit constricted 
if this genetic variant is the origin of the problem.

--- You know it's not the first time I've heard this at all.  I've heard this many times, where the owners don't think it's a jaw malformation but that the actual opening in the mouth may be smaller.  I always thought Pings was as a matter of fact, and I've recently been speaking with a shelter mom who has a deaf ferret like that.  So much so, it's on soft food.  You know there is something I just thought of.  There is a condition in humans called dysphagia.  This is where the opening of the throat is absolutely fine.  What is abnormal is the muscle tone, etc and the workings of the throat.  Such people have to take tiny bites, chew them up real well, and can eat meats very well (something about the dryness and density).  It's a genetic thing.  Has nothing to do with neural crest though.  It's just "one of those things".  It's a harsh condition at times though.  The person can seeminly cough or choke while eating.