PETS Referral Center Oncology Department

Our goal is to provide the best care possible to you and your pet, and to offer guidance during what is often a stressful time. 


Our initial appointments are 1-hour and include a complete physical exam by the doctor and in-depth discussion of your pet's cancer. We will discuss diagnostic tests that can be pursued to understand the extent and type of cancer, as well treatment options and what to expect. 


PETS Oncology sees patients Monday through Friday.  Please call 510-548-6684 to schedule your pet's appointment.

Dr. Kim Shaffer

Diplomate, American College of Veterinary Internal Medicine, Oncology

Dr. Cecile Siedlecki

Diplomate, American College of Veterinary Internal Medicine, Oncology

Regina Sanger, RVT

My journey as a technician started 19 years ago. I worked as a emergency technician for 10 yrs. The last  9 years have been in oncology.  This has been the most meaningful time in my career. The relationships I build with the clients and patients is amazing. Watching patients thrive fills my heart. Being there to hold the hands of clients as  they say goodbye makes me grateful they entrusted me with their loved ones care. 

Erin Redding

I've been an oncology technician for almost 20 years and have instilled a passion for cancer treatment and chemotherapy.  There is nothing greater than seeing a patient respond to therapy and I love being a part of that. The diagnosis of cancer in a pet is not the end, but rather the beginning of an opportunity to identify solutions that can improve a pet’s quality of life while maximizing the time they have to enjoy life with their families. 

I’m also passionate about Wildlife conservation, animal rescue and artistic expression.