Usually these patients need several appointments and checkups in order to find a diagnosis, and a treatment. Also the internal medicine consultation often takes more time than a regular one. The veterinarian will often advise to do further examinations, such as (extra) blood tests, blood pressure measurement, ultrasound examination, urine/feces test or x-rays. It is often necessary for your pet to be fasted before the internal medicine consultation (for at least 8 hours).