Those with counter surfing dogs and thieving pooches who snoop through your purse in search of goodies take note: There is a substance used in many products that might seem benign but could cause serious illness in your companion animal, or even death.

Xylitol is a popular sugar substitute found in sugarless gum, sweets and even toothpaste. But what is helpful for us humans isn't always so for pets.

Dr. Laura O'Rourke, DVM of Ann Arbor Animal Hospital gives you the information that you need in this week's "Ask Your Local Expert" segment in our Pets section.

She details more on xylitol, where it comes from, what it does to the body of a canine and, best of all, how to avoid the possibility of your dog ingesting it.