A Man and A Dog

A man come in the yard of a friend. Knocking on the door and the dog come out. The dog rises up on two legs and say:

 - My master is not home!

Of fear, the man faint. After five minutes, when he returns from faint, rises up and asks the dog:

- If you are dog, should not bark?

 The dog:

 -Yes, but I didn’t want to scare you ...