Get a bag of Dog Yummies instead, or better yet, a couple of hot dogs. When the dog starts to chase, throw a few on the ground. Even if he doesn't see them right away, he will. Make friends with the dog. Pepper spray is last resort. The dog will hate you like no other if you use it on him. For persistent dogs, over the years, I just give them a squirt with the water bottle in the face. It stops almost any dog.