A dog is a type of pet, or a canine. Some type of dogs include Poodles, Chihuahas, German Sheperds, Saint Bernards, Bernese Mountain Dogs, and Labradors and others. There are 3 different types of Labs. Yellow, Brown and Black. Dogs can live up to 20 years! A dog's life is measured in dog years. 1 human year, is equivalent to 7 dog years!