My former review was written prior to learning (today) that the woman who makes this formula, all by herself, apparently experienced a serious health setback which prevented her from getting her business up and running again after the horrific Palisades Fires. And although I wish she would have had someone dash off a quick email or made a quick call to all of her loyal customers letting us know why this product was being delayed for MONTHS (and not only had we had already paid for it, but I really think most of her customers would have been understanding--especially those of us who had seen the devastation of these fires), I understand that these things sometimes happen. The truth is that this product has kept my dog's teeth amazingly clean (to quote her vet) for years now, and this is very important, because not only does she have a heart condition (and poor oral health has a direct correlation to heart disease), but she has a tiny mouth, and no toothbrush (in fact, not even a metal nail file) will fit between her cheek and her gum line--there is literally no way to brush her teeth. Well, even after having not used Healthy Mouth in her water for more than 3 months, when my dog had her teeth recently cleaned for the first time in 3 years, the dental vet was amazed at how clean her teeth STILL were. And now, FINALLY, I have received this product in the mail (with a VERY nice apology from the manufacturer), and I look forward to continuing to do business with Healthy Mouth, because except for these two extraordinarily unusual circumstances happening one right after the other, this company has always delivered an outstanding product within a very short period of time of having placed an order; and, under the circumstances, I'm willing to give them another chance with a perfectly clean slate. I have been using Healthy Mouth water additive for at least the past 5 years, and yes, it really HAS made a difference in my dog's dental health. I AM HAPPY TO SAY THAT I NOW, ONCE AGAIN, WHOLEHEARTEDLY RECOMMEND THE HEALTHY MOUTH COMPANY AND THEIR PRODUCTS WITHOUT RESERVATION. (And P.S.: Lest anyone think the manufacturer "leaned on me" to alter my previous review, I assure you that is definitely not the case. I truly believe in this product. It WILL make a difference in your dog's dental [and possibly overall] health. My dog will be 16 years old in a few months, and she LOVES it.) read more