Lab Report and Cat Scan

A guy takes his sick parrot to the vet...

The vet takes one look and says, "I'm afraid your parrot is dead." "That's terrible," says the guy. "How can you be so sure? I’d like a second opinion." The vet opens the door and whistles. A Labrador bounds into the room, hops up onto the table, sniffs the parrot, looks up, and whines sadly. "I’m afraid it’s confirmed," says the vet. The guy asks, "But my five-year-old daughter loves this parrot! Please! Are you 100% sure?" The vet replies, "We can do one final test." He whistles again, and a cat comes into the room and springs up onto the table. The cat walks up and down the table looking intently at the parrot, then meows sadly and leaves. "Well, I'm terribly sorry, Mr. Jones, but there can be no doubt about it. Polly is dead." "That's terrible news. Thank you for your time. How much do I owe you?" "That comes to eight hundred pounds, please." "What?" cried the man in shock. "Why so much?" "Well," said the vet, "quick, accurate diagnoses don’t come cheap. Ordinarily, it would be nearer to two hundred. What pushed the price up was the Lab report and Cat scan!"