Bark Bark

A man went to a pub with his Great Dane and when he arrived, he tied the dog up outside and went in to have a beer.
A few minutes later, another fellow walked in and said, "Is that your dog outside?"
"Yes. What of it?" said the first man.
"I'm sorry, but I think my dog may have killed him."
"What kind of dog you got that can kill a Great Dane?" said the first man stunned.
"Well, he's a Chihuahua."
"Ha! How can a Chihuahua kill a Great Dane?"
"I think he may have gotten stuck in his throat." said the second man.