It is expected people will properly care for their pets.
Mark gets a new dog that he can put in his yard.
Mark wants the dog to guard the yard.
Mark takes care of the dog properly and take it for walks and to the vet.
Mark leaves the dog chained up in the yard and occasionally throws food at it.
Mark's dog is happy to belong to Mark and guard Mark's house.
Mark's dog eventually pulls the chain off and runs away from Mark.