Dead Duck

A lady took her duck to the Vet! He examined the duck, then he said, "I'm sorry Miss, to inform you, but I'm afraid, your pet duck is dead!" "I find it hard, to believe you! Is there no more tests, you can do?" He opened the door, then he told her, "I'll be back in a minute or two." He came back with a Black Lab Retriever, and a cat, that was part black and white. They both sniffed the Duck, from head to foot, then the Vet says, "they proved I was right!" He then, gave the lady his bill! One hundred and fifty, it read! She replied, "you're charging me that much, just to tell me, my pet duck is dead?" "If you believed me, from the beginning, your bill, would be just twenty bucks! But, with the Lab report, and the Cat Scan, I'm afraid, you're just out of luck!"