Simon and the better bone
(Book)

Simon, an endearing and perky brown pup with a tasty bone, spots what he considers to be a scraggly dog with a seemingly larger snack in the surface of the pond, not realizing it's his own reflection. How can Simon get the bone for himself? A request for a trade goes nowhere, so he tries to challenge the other dog to a staring contest. When nothing works, he decides to pounce--which results in the loss of the bon!