The Labrador Retriever is an athletic and playful breed of dog that is also noted as one of the most well-behaved. Indeed, the Labrador is the most popular breed of dog in Australia, Canada, New Zealand, the United Kingdom and the United States! It is even used as an assistance dog for the blind, deaf and impaired with great success. But when no one's watching, these usually obedient dogs do the craziest things!