Professional Affiliations:
Mars Veterinary Health - Oncology Advisory Board
American Society of Clinical Oncology
Veterinary Cancer Society
American Veterinary Medical Association
Wisconsin Veterinary Medical Association
Royal College of Veterinary Surgeons
American College of Veterinary Internal Medicine
Dane County Veterinary Medical Association
Board Certification:
American College of Veterinary Internal Medicine (Oncology) Diplomate, 2010
Education:
BSc (Hons) In Veterinary Pathology, Royal Veterinary College, 2004
BVMS (DVM equivalent), University of Glasgow, Scotland, 2006
Internship:
Rotating small animal medicine and surgery, Cornell University, 2006-2007
Residency:
Medical Oncology, University of Wisconsin, Madison, 2007-2010
Biography:
Dr. Kai-Biu Shiu has been caring for dogs and cats with cancer in Southwest Wisconsin since 2007 and is known for his practical, compassionate, and deeply personalized approach to oncology care. He understands that a cancer diagnosis affects the entire family, and his philosophy centers on guiding pet owners through complex decisions with clarity, empathy, and honesty.
Dr. Shiu believes there is no single "right" or "wrong" approach to cancer treatment. Instead, he works closely with each family to develop individualized, evidence-based plans that align with their goals, values, budget, and their pet's specific condition—whether that involves advanced therapy or a focus on comfort and quality of life.
He currently serves as Chair of the Mars Veterinary Health Oncology Advisory Board, where he leads efforts to advance medical quality, innovation, and clinical strategy across a global network of more than 150 veterinary oncologists. He is an active contributor to research, publications, and national speaking engagements, and remains committed to advancing the field of veterinary oncology.
Dr. Shiu introduced electrochemotherapy to the Midwest in 2017, expanding treatment options for solid tumors in companion animals. He is also deeply engaged in the veterinary and local community and is active in nonprofit leadership through scientific advisory board membership and board of director roles, supporting local veterinarians through the Dane County Veterinary Medical Association (DCVMA), advancing veterinary research through the Morris Animal Foundation, and helping families navigate cancer care through Czar's Promise.
After earning his veterinary degree from the University of Glasgow, Dr. Shiu completed a rotating internship in small animal medicine and surgery at Cornell University, where he developed a passion for oncology and the unique bond between patients and their families. He then completed a three-year residency in Medical Oncology at the University of Wisconsin–Madison. In 2010, he established the first private practice oncology service in Southwest Wisconsin at VESVSC.
The greatest compliment Dr. Shiu receives is the trust of fellow veterinarians—not only in referring their patients, but in entrusting him with the care of their own pets.
Testimonial:
"Dr. Shiu is not only a fellow veterinary colleague, Oncology specialist I often refer my own clients for consult, and an active community member in the successful PuppyUp fundraiser; but he has personally provided Oncology guidance and therapy for my own young poodle with Digital melanoma and my father's seeing eye service dog suffering from hemangiosarcoma. He is a dedicated, knowledgeable, caring, forthright, and personable veterinarian who really goes the distance for each and every one of his patients and their humans. Dr. Shiu and the team at VES is only a phone call away and I feel very comforted knowing my own pets and those of my clients are in the best hands." - Dr. Laura Oxley
