Awhile back, I had one of our dogs' teeth cleaned and the vet sent me home with a bottle of canine "dental rinse" supposed to help keep teeth free of tartar. When I tried it, the dogs spat it out and let me know there was no way they were going to allow it. I tried a bit on my tongue and to my amazement, it burned! I read the bottle (which I had been charged extra for, although it was never asked for or mentioned) and it contained Zylitol. I poured it down the drain. This was not our regular vet and I never called them on it. Probably should have, but didn't. I just made a note to read labels thoroughly on pet supplies. I knew I had read not to let dogs have any sugarless candy because it often contains Zylitol.