Yup those are the jokes. There is only one talking dog joke. The dog really can talk.
A variation on a theme.
A traveling salesman goes up to a farmhouse where a dog and cat are sitting on the front porch. The salesman reaches down and scratches the dog's ears and says, "how are you, fella?" The dog looks at him and says, "I'm fine, how are you?"
The salesman is flabbergasted at seeing a talking dog and asks him to say something else. So the dog replies, "What do you want me to talk about? Weather's been good, we're getting enough rain and the crops are healthy." Then he gets up and says, " well, it's been nice chatting with you but I hear my master calling", and he trots off.
At that moment the farmer opens his front door and the salesman is still shaken up. He says to the farmer "I can't believe it! You have a talking dog! You should go into show business, you could make a million dollars!"
The farmer just shakes his head and smiles. "Did they pull that joke on you, too? Mister, that dog can't talk. The cat's a ventriloquist..."
