OMG. Bought this product, a bit pricey but my darling Yorkie - a rescue dog only has 4 teeth when I adopted her and they were getting dark brown with plaque. I bought this product and within one week her teeth were back to yellow. There is still a bit of darkness on one side of one of her teeth but amazing! I am so impressed. She won't let me touch her mouth, so this is how I give it to her ..I wait until she yawns in the morning, then do a quick spray into her mouth... she has no idea where it comes from but knows something has happened...but I stroke her like nothing has happened!! (Also it doesn't taste of anything much) so within about a minute or so, she has forgotten about it.
I have used this before and think it is a good product. My little Yorkie has poor teeth and this product oes get a fair bit of the tartar off his teeth. I also use it on my large dog as a precsution against a build up.