Maxi/Guard Oral Cleansing Gel - Veterinary dentistry\'s most user-friendly and effective oral cleanser and freshener for dogs, cats, horses and exotics. Maxi/Guard Oral Cleansing Gel offers the internationally patented compound, zinc ascorbate/taurine.  Maxi/Guard is natural, safe for daily use, inexpensive, taste free, and provides good pet acceptance. Works with or without brushing.