Dictionaries often mention the "Puzzle Peg" or "Dog's Puzzle". They are not really puzzles because they are not intended to have a solution. Above is a picture of such a puzzle in action from Geoffrey Gambado "The Annals of Horsemanship" 1792. This device prevents the dog from getting up to any mischief because it cannot eat or bite anything.

An illustration can be seen on the Ephemera pages of the other type of a Dog Puzzle, which discourages it from running too fast.



True Dog's Puzzles are made in a variety of forms. Here is Lily playing with some modern Dexterity puzzles which have been specially designed for dogs.

Rather than intellectual satisfaction, the reward is the extraction of food; nevertheless different techniques are required for solving each, and it is surprising how quickly she learned them.