"Angels' Eyes is the best product for tear stains! It's the only thing that works for my white, fluffy doggies. I mix it up with a little bit of peanut butter, and they love it. They won't eat it if I sprinkle it on their dry food... Also, I can't monitor how much each one of them gets if I do it that way.
The only drawback is that you HAVE TO give Angels' Eyes to your dog every day for a week or 2 before it really starts working. Then you can cut back on how often you administer the stuff, but you MUST continue to give it to them.
Other than that, this product is SO GOOD!!!"