Dog is a very cute animal.It is the favourite pet for most of people.A dog is very outgoing,because it doesn't like to stay inside a house all the time.If you own a dog,you have to walk your dog every morning.Unlike the cat,a lonely animal,dog likes to spend time with people.It likes to play the ball catching game with its owner.The dog waves its tail when it feels happy.However,some dogs may feel insecure around strangers.Then,they will bark at those strangers.