A lady took her duck to the vet . The vet put his stethescope on the duck and said sorry the duck is dead
The lady cried, NO! NO! are you sure? You did not do any tests or anything.
The vet went out and brought the big black Lab into the office and the dog sniffed from head to toe and bowed his head and headed for the door.
The vet let the cat into the room and the cat sniffed the duck from head to toe and toe to head let out a sad meow shook her head and left the room.
The vet said the duck is dead and gave the lady his bill of $1000.
WHAT? you charged me 1000 dollars to tell me my duck was dead
The vet replied, Well if you had of believed me in the first place it would have been $20 but after the lab report and the cat scan it is $1000.

Have a good day