Our lab's muzzle area stinks, seriously its rank. I can't even stand to be near his head anymore, like a garbage smell, sour. His breath is fine, his teeth are all in great shape but his face itself stinks. Any ideas? He does not have the typical "tight face" of a lab, he drools quite a bit and has large jowls, I'm not sure if that has anything to do with it. It never used to smell, but the past few months it's awful.