Sorry for leaving you guys hanging! I was shopping for some special goodies for the po' little guy. hehe
Ok, so... our Vet said he could NOT find anything. The right side of his jaw was a little swollen, and the muscle seemed like it was strained, but his jaw opened and closed fine when he was out and his teeth are fine. He did some accupuncture on his jaw and gave me Metacam for the pain.
$250 for a strained muscle... but it's worth the peace of mind! : ) Fozzie has actually been acting much more chipper since he got home. His chewing is definitely improved, and he is opening his mouth a lot wider. He even lets me open it, now. I think the accupuncture actually worked! Thanks for all of the good vibes.