Can anyone imagine anything worse than waking up, discovering that a dog is breathing into your face?
Why can't dogs use toothbrushes like the rest of us? There's only one thing that's worse than a dogs breath, and that's feeling a dogs breath in your face the morning after a serious bender, when you've got a hangover that don't intend to leave for the rest of the day.
Of course, waking up after a serious bender, your breath is probably worse than the dogs, so just tell it to blow.