The vet examines the dog and says, "I'm sorry. I'm afraid your dog is dead."

"Dead! How can he be dead? He was just fine yesterday. Are you sure he's dead? Isn't there some other test you can run?"

The vet leaves and returns in a moment with a pet carrying case. He opens the case and a large cat emerges. The cat plods over to the dog and sniffs around its head. It then circles the dog, sniffing and poking around. After a minute or two the cat returns to its cage.

"Well," says the vet, "That pretty much proves it. He's dead."

"I guess you're right," says the woman, now coming to grips with what happened. "At least you did your best. How much do I owe you?"

"$230."

"$230?! For what? All you did was tell me my dog was dead. What did you do that costs $230?"