Lethal doses of Xylitol for dogs is 0.5g per kg of pet weight, while for chocolate it 5g per kg for pure baking chocolate all the way to not being lethal at all for white chocolate. We're talking a magnitude of difference is lethal even for the most potent form of chocolate, and for dark chocolate it's 15g/kg versus 0.5g/kg for xylitol.

To give an example, a typical hershey's milk chocolate bar is nearly impossible to kill your dog with, even if it's a small dog.