this may seem odd but anyways when you are walking your dog do you ever hunt and walk the dog at the same time? I don't have a dog but i have a large rabbit and to keep her from getting bored and to work her out a little i walk her around in the hood or in the woods. when i walk cowgirl(that's her name) i have a small harness on her , rabbits enjoy being taken for walks, and it's important to have them on a leash for safety, and i lot of times i have my airgun that is painted pink in a shoulder holster for just varmint shooting. if i see a staring, rat, mice, or snake when we are walking i pull it out and shoot it.