Refund

Walter was in the backyard, and he heard something in the neighbor's yard, so he commences barking.  I say, "Bill, is that you?"  And he says, "yeah."  I tell him, Walter graduated from puppy training class last Saturday, but he tried to mate with one of the dogs in the class, and then last night, he pooped on the floor.  Bill says, "Did you get a refund?"