Thanks to all of you for your suggestions. I had the GSP's teeth cleaned while having surgery on her ear less than a year ago, and they are already ugly again. She sucks her dry food down like there's no tomorrow, and still gets this buildup. My L...

Even though I feed a premium dry food (Diamond), both my dogs, a Lab and German Shorthaired Pointer, get a heavy buildup especially on their upper back teeth. Brushing doesn't seem to help. One friend's Lab steals and chews her Crest White Strips f...