Question: what ingredients in gum are bad for dogs?
Answer: Xylitol poisoning in dogs. Xylitol is a common sugar substitute that can be toxic to dogs in even small amounts and it can be fatal. It's regularly found in sugar-free chewing gum, toothpaste, mouthwash, vitamin supplements, a small handful of peanut butter brands, and other 'low sugar' or sugar-free products.