A dog and meat seller

A meat seller feels surprise when a dog come to his shop with 10 dollar and one order note. After he kept the money and give the order to the dog. He follows the dog. The dog walk through the street and crosses the zebra-crossing and take a bus. When the dog get home it can not to open the door,so it strikes the door. After that the dog's master open the door and hit the dog. The meat seller amazed and asked the dog's master '' Why you hit it. It's the intelligent dog I never seen". "Do you know". This is the second time it forgot to bring the hours key when it go out". The dog's master respond him, so I must punished it to make it remember that the next time.