A man brought a very limp dog into the veterinary clinic. The doctor placed his stethoscope on the dog's chest, shook his head sadly and said, "I'm sorry, but your dog has passed away."
The man screamed, "How can you tell? You haven't done any testing on him or anything. I want another opinion!"
The doctor left the room and a few moments later, returned with a Labrador Retriever. After a considerable amount of sniffing, the Retriever sadly shook his head and said "Bark ... definitely dead".
Then the vet left the room again and a few minutes later, returned with a cat, who also checked out the dead dog on the table. The cat sadly shook his head and said, "Meow ... definitely dead."
Then the veterinarian handed the man a bill for $600.
The man went nuts and yelled, "$600! Just to tell me my dog is dead? This is outrageous!"
The vet shook his head sadly and explained, "If you had taken my word for it, it would have been $50, but with the lab test and the cat scan, it's extra."