My 5 month old puppy recently started getting REALLY bad breath. Should I be worried?

bad breath
Jaspersmom asked:

His food is dry but we recently started adding water to it so he slows down as he eats. He is teething and his molars and a few canines have dropped recently. Also because he started obedience school a few weeks back we have added moist treats to his diet (natural balance, roll-over) as incentives during training. Should I be worried (ie… worms?) or is this just bc of the softer food building up?
He has been through deworming meds in full and has all his shots.

Rapid Cure for Bad Breath