I actually had heard this before -- when I took Jackson years ago to the veterinary dentist I recall her telling me this.
Crazy stuff.
It's why Jackson needs another dental because I am such a slacker and hardly brush anymore. All the sudden his teeth got so much tarter. Amazing how fast it can happen to these little guys.
Thanks for sharing -- such good info to know! So many people look at you like you're crazy when you say you brush your dogs teeth. But it can lead to so many other issues.