Did you know that common food items, like sugarless gum and toothpaste can kill or injure your dog? Sugarless gum contains Xylitol. Xylitol, while safe for humans, causes the secretion of insulin in dogs, which dangerously lowers blood sugar and can cause liver failure and death depending on the amount ingested. And there are many other items you should NEVER allow your pet to eat like raisons, grapes, nuts and chocolate. Here is a more complete list.