EXTRA® sugarfree gum contains xylitol, which is a safe, even beneficial, additive which has been used in food, confectionery and other products - like toothpaste - as a sweetener and flavour enhancer for over 30 years and has been widely approved by regulatory authorities all over the world.
Although chewing gum products are not intended for use by dogs, cats or other pets, the Veterinary Poisons Information Service (London) has reported that xylitol may be toxic for dogs.
In fact, in addition to food products containing xylitol, the Veterinary Poisons Information Service recommends that many foods that are perfectly safe for humans be kept away from pets because of potential harm - including grapes/raisins/sultanas, chocolate, onions, yeast, dough, salt, macadamia nuts, coffee grounds, tea leaves, alcohol, fatty foods, avocadoes and garlic.
For more information regarding Xylitol or other foods that may be potentially harmful for pets to consume please contact your local vet.