You may already know that Xylitol is toxic to dogs, and that it is present in many common items, like sugar-free gum and candies. Xylitol comes from the same source as “birch sugar” or “birch sap”, which may be listed on ingredient labels of the same kinds of items as Xylitol. Just one piece of sugar-free gum containing Xylitol or birch sugar can make your dog very sick. Continue reading more about the dangers of these substances at the link below.

https://vetmedbiosci.colostate.edu/vth/animal-health/birch-sugar-is-the-same-thing-as-xylitol-and-its-toxic-to-dogs/