Dogs are very cute animals. They are mammals which means that their babies are born not in an egg. Some of them are used as attack dogs for police stations and fire stations. Dogs have many different breeds. For example there are Golden Doodles, Golden Retrievers and German Shepards. Some people train their dogs to do tricks like jump through hoops and run through obstacle courses. The most famous saying that everyone should know is that a dog is a man's best friend.