We are committed to caring for your pet – while maintaining the highest level of safety for our Associates and pet owners. We thank you for your continued patience and support. 
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Breann Sommer

DVM, MS, DACVIM (Oncology)
Breann Sommer
Veterinary Specialist
Availability: Tuesday, Wednesday, & Thursday
Breann Sommer

At a Glance

Practicing Since:


My Pets:

Piper Kitty- Cat
Channing Tatum- Cat
Bindi- Dog


Dr. Sommer understands that coping with a beloved pet’s cancer diagnosis can be difficult and stressful. She strives to help her clients navigate their pet's cancer journey with compassion and understanding while providing the best available treatments. Treatment options are individualized and might include chemotherapy, radiation, surgery, or even palliative care. Dr. Sommer and her team will help you decide which treatment is best for your pet and family.

Dr. Sommer sees canine and feline patients with all types of cancer and has a special clinical interest in canine bladder cancer given her experience assisting with bladder cancer clinical trials as part of Purdue’s renowned Canine Bladder Cancer Clinic.

Residency Training:
Medical Oncology - Comparative Oncology Program at Purdue Veterinary Medicine, 2019

Internship Training:
Small Animal Medicine & Surgery - Louisiana State University School of Veterinary Medicine, 2016

DVM Training:
University of Wisconsin School of Veterinary Medicine, 2015

Clinical Interests:
Bladder cancer, lymphoma

Naturally-Occurring Invasive Urothelial Carcinoma in Dogs, a Unique Model to Drive Advances in Managing Muscle Invasive Bladder Cancer in Humans

Naturally-Occurring Canine Invasive Urothelial Carcinoma: A Model for Emerging Therapies

Lingual Mast Cell Tumour in a Cat

See our departments


Cancer is the leading cause of death in dogs and cats. Advances in our understanding of cancer biology have helped pets live longer, with an excellent, dignified quality of life. Our goal is to give you all the information you need to make the right decision for you and your pet. We may offer additional diagnostics such as aspirates, biopsies or staging to refine a treatment plan that may include chemotherapy, surgery or radiotherapy; all with the goal if improving your pet's quality of life. At Veterinary Specialty Center, you'll have the peace of mind knowing you will see the same board certified oncologist at every visit.

We perform advanced diagnostic procedures; including ultrasound and biopsy procedures; or interpret tests already performed by your veterinarian to identify the type, location, and behavior of a tumor. After collecting this information and consulting with your veterinarian, our cancer specialist will describe the behavior and stage of the cancer, as well as the likely outcomes and treatment options to the pet owner. These options are tailored to the animal's particular cancer, prognosis and lifestyle and will be consistent with the owner's goals for the pet. Cancer treatments that may be recommended can include medical treatments (vaccines, chemotherapy, anti-vascular drugs), surgery and/or radiotherapy.

Some types of cancer are very responsive to chemotherapy. The approach for using chemotherapy in dogs and cats is very different from that in humans; our lower doses of chemotherapy often result in quick improvement in quality of life during treatment, rather than the approach in human oncology of using much larger doses of chemotherapy resulting in severe side effects but higher cure rates. Many chemotherapy protocols can often be covered by pet insurance.

Why See An Oncologist?

When owners are faced with cancer in their pets, veterinarians will recommend or offer a consultation with a veterinary oncologist. An Assessment of the pet's history and physical examination is then done by an oncologist and will sometimes recommend a staging and treatment regimen. This regimen can be performed locally with their own veterinarian or at a specialist center depending on the pet’s treatment plan.

VCA Veterinary Emergency Service & Veterinary Specialty Center

4902 East Broadway

Madison, WI 53716

Main: 608-222-2455

Fax: 608-467-6014

Hospital Hours:

    Mon-Sun: Open 24 hours

Specialty Services Hours:

Mon-Fri: 8:00 am - 5:00 pm

Are you a Primary Care Veterinarian? We have dedicated resources for you.

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