The Garden of Abdul Gasazi

A little boy chases the dog he's tending into a mysterious garden. Eventually he comes to the mansion of the owner of the garden who is a magician. He says the dog has been turned into a duck and there's no telling when the spell will wear off. The duck takes his hat and flies away. When he gets home the dog greets him. Then the dog brings him his hat. The reader is left to wonder whether it all really happened or not.