A Veterinarian was feeling ill and went to see her doctor.

The doctor asked her all the usual questions: what were the symptoms, how long had they been occurring, etc..

Suddenly, 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."