How to Improve or Fix Bad Breath In Dogs or 

How to Prevent Vegetative Endocardiosis (Bacterial Heart Valve Flap Disease) In Dogs

Infections Spreading from Mouth to Lungs and Heart in Dogs. 

Wow! I just found out Oxyfresh is available on Amazon! 

For oral infections: http://amzn.to/2E9iwCl

I've been recommending it to clients for literally YEARS except I've hesitated because it used to be a pyramid scheme behind the product. 
So how does it work and why?   

Well crust / tartar on the teeth comes from calcification (calcium hydroxyapetite) of the colonies of slime bacteria on the teeth. 
If you have slime bacteria, sooner than later you have plaque / tartar / crust. 
Well that's fine in dogs; because you can keep them in front of hard dental exercise which increases saliva, helps remove slime bacteria and can even mechanically chip away at tartar. 
In cats, not the same. 
Well anyway, enter Oxyfresh. It's basically good-tasting Listerine you can swallow. Great for pets for that very reason. They can drink it in their water, and it kills all their slime bacteria, hence, NO TARTAR, ever. 
Breath also improves A LOT. 
I recommend Oxyfresh for my older dogs to keep infections minimal. Especially older dogs who could be metabolically destabilized by a dental under anesthesia. 
But even for younger dogs, if you can eliminate the slime bacteria you do TWO things, first you improve breath and secondly, you short-circuit the formation of tartar. 

You can't drink Listerine! But with Oxyfresh they figured out a molecule with disinfectant properties that is instantly NEUTRALIZED by Hydrochloric acid in the stomach. 
So no gastrointestinal flora upset.

There is no substitute. Every year the drug reps come to the clinic with products that as "as good as Oxyfresh" and I've tried most of them, and they do not have the same molecule nor the same effect. Not even close. 

(We had a dog named Trudy that had fish breath and that's what worked. Exclusively. Even though we tried everything else available at the time)

Anyway, so now Oxyfresh is available easily at Amazon. Here's a link that makes me 0.12 cents a bottle lol

For oral infections: http://amzn.to/2E9iwCl