Jax does that. I think Kaiser did that when I visited Jamie too. lol Max at ACS does that. It doesn't bother me and I usually just grab their jaw lightly and play with them. As long as they aren't gnawing on anyone else, I don't think it will lead to anything. IMO, it's an attention getting thing.
It's MICHELLE, scarfish! My name is MICHELLE! Jax is my DOG!
~The strength of one's opinion should not exceed their knowledge on the matter~