A man brought a very limp dog into the veterinary clinic. As he laid the dog on the table, Doctor Buck pulled out his stethoscope, placing the receptor on the dog's chest. After a moment or two, the Doc shook his head sadly and said, "I'm sorry, but your dog has passed away."
"What?" screamed the man. "How can you tell? You haven't done any testing on him or anything. I want another opinion!"
With that, Doc turned and left the room. In a few moments, he returned with a Labrador Retriever. The Retriever went right to work, sniffing the poor dog on the table and checking him out thoroughly. After a considerable amount of sniffing, the Retriever sadly shook his head and went, "Woof."
The veterinarian then took the Labrador out and returned in a few moments with a cat, which walked around the poor dog several times and then sadly shook his head and said, "Meow." He then jumped off the table and ran out of the room.
The veterinarian said, "There's nothing more I can do." He handed the man a bill for $600. The dog's owner went postal. "$600! Just to tell me my dog is dead? This is outrageous!" Doc shook his head sadly and explained, "If you had taken my word for it, the cost would have been $50, but with the Lab work and the cat scan..."