the vet going to the doctor

A Veterinarian was feeling ill and went to see her doctor. The
doctor asked her all the usual questions, about symptoms,
how long had they been occurring, etc., when she interrupted
him: "Hey look, I'm a vet - *I* don't need to ask my patients
these kind of questions: I can tell what's wrong just by looking."
She smugly added, "Why can't you?"

The doctor nodded, stood back, looked her up and down,
quickly wrote out a prescription, handed it to her and said,
"There you are. Of course, if *that* doesn't work, we'll have to
have you put to sleep."