One day a man takes his dead dog to the vet. The vet says that he's sorry but the dog is dead.
The man says that's not good enough. He wants a second opinion. The vet brings out a cat. The cat walks up to the dead dog and says, "Meow".
Still not satisfied the man demands another opinion. The vet brings out a labrador retriever. The lab looks at the dead dog and says, "Woof".
The vet looks at the man and says that'll be $500, $300 for the cat scan and $200 for the lab work.
P.S. Ripped from one of OneEyeJack's posts