The dog is one of the most popular pets in the world (of course cat lovers will argue for cats). Dogs have long played an important role in the lives of humans. It's thought that dogs have been pets for thousands of years. Dogs are often called Man's Best Friend. This is because dogs help man out in so many ways
Different breeds have different characteristics and skills, but most dogs have large teeth, can run fast and jump, walk on their toes, and have strong muscles