A man brought a very limp dog into the veterinary clinic. As he lay  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, ........................................................................are you ready? ........................................................................are you sure? ............................................................................punch line! ........... but with the Lab work  and  the cat scan .............." (I know; please no emails.)