I use Oxyfresh Pet Gel and Oral Hygiene Solution. Taycie started having some fishy smelling breath and since I started using it it went away.
I found this product actually recommend by a yorkie breeder in NV and I thought I would give it a try. I really do love it and it works so well!
You can add the Oral Hygiene Solution to the water or what I like to do because it is expensive and I like to get the most for my buck I bought a travel bottle with a pump and I just mist it directly in her mouth 2x a day along with brushing.
Here is a link...
Oxyfresh.com | Pet Care | Pet Gel
I am not sure if this is what you might be looking for but check it out! It works WONDERFUL for us!