A dog is a domesticated animal. Based on recent studies on dogs, it has been said that there are 329 varied species of dogs. Dogs have a very powerful sense of smell and it has been found that it is at least 4 times more powerful than humans. Labrador Retrievers, golden Retriever, beagle,and Cocker spaniel are some of the friendliest dog breeds in the world. Norwegian Lundehund is the rarest dog breed in the world. According to Guinness World Records, a Portuguese dog named Bobi was crowned the world’s oldest dog ever at 30 years and 266 days old. The tallest dog in the world is 44 inches tall. Dogs are proved to be extremely loyal and well trained. They say dogs are man’s best friend as they have been the best companion throughout the years. They are independent of humans as well. Dogs like any other needs attending and love and care and should be well taken care of.