Woman brings a duck to Vet.
Vet says, "Your duck is dead."
Woman says, "Are you sure?"
"Yes," says Vet.
"How can you be sure you've done no tests."
Vet brings in a Labrador Retriever which sniffs the duck and shakes his head.
Next, a cat which sniffs the bird and shakes its head.
Vet says, "Sorry, but as I said your duck is dead." Vet hands woman a bill.
She cries, "$820 to tell me my duck is dead!"
Vet says, "If you had taken my word for it the bill would be $20, but Lab Reports and Cat Scans cost extra!!"