A man brought a very limp dog into the veterinary clinic. As he lay the 
dog on the table, the doctor pulled out his stethoscope, placing the 
receptor on the dog's chest. 
 
After a moment or two, the vet 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, the vet turned and left the room. In a few moments, he 
returned with a Labrador Retriever. The Retriever when 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 
said, "Bark". 
 
The veterinarian then took the Labrador out and returned in a few moments 
with a cat, who 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" and 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!" 
 
The vet shook his head sadly and explained. "If you had taken my 
word for it, it would have been $50, but it always costs more for Lab 
work and a cat scan..."