Good going! The coyote following dog back, is a territorial thing. Domestic dogs during the denning season,drive coyotes crazy. Makes it easier to call coyotes, as dogs become the main focal point. There are some entertaining DVD's on coyote calling with dogs. Guys that have trapper/calling dogs, will usually, use remote collars to bring there dogs back. Airedales cross Mt Cur. are popular. I'd make sure your dogs shots are up to date. Majority, of the time there's plenty of scrapping going on.