What are the main physical features of the Boxer breed of dogs?

Here are some interesting facts about the Labrador Retriever:

• The Labrador Retriever was originally bred to assist fishermen.
• This breed of dog has webbed feet.
• A Labrador can carry an injured animal in their mouth without hurting it.
• The Labrador is one of the friendliest and easiest to train breeds.
• The Labrador is the most popular dog breed as a pet and a guide dog in the world.
• There are three coat colours that Labradors come in - black, yellow and chocolate.
• A litter of Labrador puppies can have dogs of all three colours.
• Despite the similarities between the Labrador and the Golden Retriever, these two breeds aren't that closely related.
• The closest living relative of the Labrador was in fact the Newfoundland.
• Marley from the book Marley and Me was a Labrador Retriever.