My puppy is 5 months now, teeth coming in and out everyday and his mouth absolutely reeks. I can't even describe the smell. If he yawns or barks I can smell his mouth even if there's 3' between us. It's terrible. I read that it's normal, that losing teeth just makes a great environment for bacteria but what can I do to lessen its presence? I have been brushing his teeth(no toothpaste) but it's just enough for him to get used to it rather than thorough brushing at the moment, and he's had breath freshening treats(they use parsley) which haven't done squat. Suggestions?