Blame The Owner, Not The Dog
Theres nothing more annoying then when people dont pick up after their pets. Its a common courtesy that doesnt take much effort and shows respect to everyone else around, as well as the environment. This sign is a friendly reminder for people to pick up after the dog.
However, its different because it leaves a message for the pups too. Were not entirely sure what it means, but the dogs most likely do. It also cant be that bad if it says good dog at the end.