Our Services

We understand how difficult it is to learn that your pet has been diagnosed with cancer. However, you don’t have to go through this experience alone. The Oncology department at Veterinary Specialty Services strives to take the fear out of the diagnosis of cancer by providing each family with compassion and knowledge to handle this situation with hope and a positive outlook.

Service Highlights

A board certified veterinary oncologist is a veterinary internal medicine specialist who has also obtained additional certification in veterinary oncology. A veterinary oncologist has specialized knowledge in the diagnosis of cancer, the staging of tumors, the development of treatment plans, and the administration of chemotherapy. When your pet is faced with cancer, a veterinary oncologist will work in concert with your general veterinarian in order to obtain the best possible medical outcome for your pet. A veterinary oncologist helps to develop treatment plans that incorporate one or all of the following options:

  • Surgery
  • Chemotherapy
  • Radiation therapy
  • Immunotherapy
  • Canine and feline cancers most commonly treated at Veterinary Specialty Services include:
  • Lymphoma and leukemia
  • Mast cell tumor
  • Hemangiosarcoma
  • Osteosarcoma
  • Melanoma
  • Anal gland carcinoma
  • Bladder carcinoma

The Oncology Department includes two board certified veterinary oncologists and four veterinary technicians experienced in administering chemotherapy and handling patients with cancer. Your pet’s quality of life is the most important factor in choosing the best treatment course. During your initial visit consultation, we will examine your pet, conduct any additional diagnostic testing necessary, and discuss treatment options. Together, we will decide upon a plan of action that best serves your pet and your family.
There are many options to help keep your pet comfortable during treatment for his disease. From pain management options, to special nutrition recommendations, to medications that can help lessen the nausea associated with chemotherapy, our goal is to keep your pet as comfortable for as long as possible.



American College of Veterinary Internal Medicine, Oncology


University of Missouri


Animal Medical Center in New York City, NY


Animal Medical Center In New York City, NY


Dr. Taylor Spent A Year As An Emergency Veterinarian In Saint Louis Before Completing Her Residency.

Bonnie E. Smith

DVM, Diplomate ACVIM (Oncology)

Dr. Bonnie E Smith is originally from Cape Girardeau, Missouri. She obtained a Bachelor of Science in Biology, as well as her veterinary medical degree, from the University of Missouri-Columbia. She then completed a one year rotating medicine and surgery internship at The Animal Medical Center in New York, New York. Dr. Smith came home to Missouri and worked as an emergency veterinarian for one year at the Animal Emergency Clinic in St. Louis. She then returned to The Animal Medical Center in New York to complete a three-year residency in medical oncology.  Dr. Smith is delighted to be practicing in St. Louis, near family and friends. She spends her free time with her husband, chasing after her twin daughters, and snuggling with her Yorkie mix, Opie.

Veterinary College

Cornell University

Rotating Internship

Tufts University

Oncology Internship

Virginia-Maryland College of Veterinary Medicine

Oncology Residency

Virginia-Maryland College of Veterinary Medicine

Advanced Degree

Master of Science, Virginia Tech


DVM, Diplomate ACVIM (Oncology)

Dr. Erin Fagan knew she wanted to be a veterinarian from an early age, and realized her passion for veterinary oncology while in veterinary school at Cornell University. She was fascinated by cancer biology and cancer chemotherapy, and loved the bonds she made with the patients and their pet parents on the oncology service. She pursued a rotating internship after graduating veterinary school at Tufts University, and then moved to Virginia to complete an oncology internship and residency at the Virginia Maryland College of Veterinary Medicine. She earned a concurrent masters degree while in her residency in Biomedical and Veterinary Sciences.

Dr. Fagan’s particular interests in veterinary oncology include lymphomas and leukemias, histiocytic sarcoma, targeted chemotherapy agents, and pet parent education.

When not treating patients, Dr. Fagan enjoys spending time with her fiancé and two cats, Milo and Rupert. Originally from Vermont, Dr. Fagan is an avid downhill skier, and her fiancé has promised her they can travel for ski trips in the winter. She also enjoys cheering on her favorite baseball team, the New York Yankees, but has been to a few Cardinals games in St. Louis to root for the home team.



Patient visits are by appointment only or can be seen in association with an emergency or critical care appointment.

For an appointment: (636) 227-9400.
After hours/weekend emergencies: (636) 227-6100.


Patient visits are by appointment only or can be seen in association with an emergency or critical care appointment.

For an appointment: (636) 227-9400.
After hours/weekend emergencies: (636) 227-6100.


Monday - Friday: 9:00am - 5:00pm

Emergency Hours

Weekdays, Weekends, & Holidays: 24 Hours