Dog are a true-hearted animal. Dogs vary widely in colors, shape, and size. It’s considered as a faithful friend of man a dog guards the house of the owner kids like to play with dogs. The domestic dog is a member of the Canis, which forms part of the wolf like a Canidae, and they’re the most widely abundant terrestrial of carnivore. They play several roles for humans, such as hunting, pulling loads, protection, helping the police and the army, and camaraderie. This influence in human society has given them the nickname “man’s best friend“. The dog was the first species to be domesticated, and has been bred selectively over millennia for different behaviors, sensory abilities, and physical attributes.