Jela's Phat Phibs

Hi Guys!

I have a 2 year old Italian Leatherback that I am growing concerned with. Over the last couple of days he has began holding his mouth slightly open all day and all night. This isn't to be confused with when they get too warm and open their mouth all of the way, it is more like for some reason, he can't close his mouth all of the way. Have any of you witnessed this behavior before?? Am I just being paranoid and paying too much attention to him? He looks and acts great, has a great appetite and feeding response etc. I just can't figure this out. Any comments are appreciated.