A puppy named Jinx recently tasted peanut butter for the first time, and her delightful reaction was captured in this cute video. Before breaking out a jar of peanut butter, however, remember to check the label to ensure that it does not contain Xylitol, a sugar substitute that can be harmful to dogs. While peanut allergies are rare for canines, some dogs may develop them, so keep an eye out for any adverse reactions.