So this woman goes into the vets with a duck...a dead duck.   The vet says "your duck is dead"...she says "No it's in a coma" He insists it is dead but she insists it isn't. The vet leaves the room and comes back in followed by his Labrador dog...the dog sniffs the duck and turns away to walk out of the room. He then calls his cat in and it sniffs the duck....then swiftly turns to walk away.
The vet then says "Your duck is dead and that will be £80 please"
She said "that is a lot of money"...to which he replied "well the charge for ascertaining the duck was dead would have been £20...but you insisted it was alive so the extra charged is for the Lab report and the cat scan".