Click here to read our COVID-19 protocol.

To Our Valued Clients,

The safety and well-being of our clients, patients, and staff are our highest priority. As such, we are closely monitoring the most recent reports from the CDC as well as state and local government agencies relating to COVID-19.

In response to updated reports and information that continues to be presented, we are taking all precautions necessary to protect everyone’s well-being and have made the decision to institute a “no visitor” policy starting March 20, 2020, until further notice. This means that only hospital personnel will be allowed in the building. In order for us to adhere to this and still continue to provide our clients and their pets with the care needed, we are taking the following measures:

  1. All patient examinations will be either concierge “curbside” or drop-off appointments. When you arrive at the hospital for your appointment time, please call the office from your car to let staff know that you are here. A staff member will come out to your car to bring your pet inside for its exam. Once examined, the doctor will call you to go over any findings and recommendations. After the examination and/or diagnostics are done, your pet will be brought back out to you. A staff member will then be out to collect payment (credit card payments can be made over the phone) for the visit as well as bring you any prescribed medications.
  2. Our hours have changed:
    Mon – Thurs: 8:00 AM – 6:00 PM, Fri: 8:00 AM – 5:00 PM, Sat: 8:00 AM – 3:00 PM, and closed on Sundays until this crisis passes.
  3. All medication pick-ups will also be curbside. Please call us when you arrive, and we will deliver the ordered items to your car. Now is also an ideal time to utilize our online pharmacy for home delivery of medications and prescription diets. Please visit our online pharmacy here.
  4. We ask that if you or your family members are sick, please reschedule your appointment or ask that someone else bring your pet in.

If anyone has any questions, please call or email us. We will continue to stay in touch and keep you up to date on any changes going forward and appreciate your understanding.

Best regards,

The Doctors & Staff of Sully Animal Hospital

Our Team

Meet the veterinarians and team of Sully Animal Hospital below!


Our Doctors

Our Staff

Our Doctors

Dr. Brenda Taddeo


Dr. Taddeo's Bio

Dr. Taddeo is the owner of Sully Animal Hospital. She comes from northern Michigan, and because of the frigid winters, she decided to go south to complete her undergraduate degree and found herself at High Point University. She attended Ross University School of Veterinary Medicine and completed her clinicals at Purdue University College of Veterinary Medicine.

After graduating, she moved to northern Virginia with her husband, who is native to the area. Dr. Taddeo has practiced with the Northern Virginia Veterinary Associates and primarily worked at Chantilly and Centreville Square Animal Hospitals. She also practiced at Prince William Emergency Veterinary Clinic in Manassas, where she was able to gain critical patient care experience. Dr. Taddeo enjoys surgeries and has one of the best recovery rates in the D.C. metro area.

Dr. Taddeo lives in Fairfax, Virginia., with her husband and three girls. They have two cats named Skitters and Kitt.

Dr. Taddeo believes that treatment does not stop with the diagnosis and a medical prescription. She feels that high-quality medicine and TLC are essential aspects of patient care. Dr. Taddeo prides herself on treating all of her patients as if they were her own.

Dr. Perez


Dr. Perez's Bio

Bio coming soon.

Dr. Tibor Lazar


Dr. Lazar's Bio

Dr. Lazar is a Diplomate of the American College of Veterinary Surgeons.

He is one of a small number of board-certified veterinary surgeons throughout the world. Dr. Lazar earned this coveted status from the American College of Veterinary Surgeons in 2003, following an intensive three-year surgical residency and a rigorous board certification exam.

Dr. Lazar grew up in Fairfax County, graduated from Robinson High School in 1987, and received his Bachelor of Arts degree in biology at the University of Virginia in 1991. He began his veterinary training at the Virginia-Maryland Regional College of Veterinary Medicine and graduated with a Doctor of Veterinary Medicine degree in 1996. In 1997, he completed a one-year rotating internship in small animal medicine and surgery at the Animal Medical Center in New York City.

Following a year of private practice in Manhattan, Dr. Lazar moved to Maitland, Florida, for a one-year small animal surgery internship at Affiliated Veterinary Specialists. He then remained at Affiliated Veterinary Specialists for a three-year residency in small animal surgery. Upon the completion of his residency in 2002, Dr. Lazar returned to northern Virginia. In 2003, he earned board certification from the American College of Veterinary Surgeons. He has spent the past ten years focused on small animal specialty surgery in northern Virginia.

Dr. Lazar lives in Reston, Virginia, with his wife, their two sons, and many pets, including dogs, cats, birds, snakes, and fish.

Dr. Christine Caro


Dr. Caro's Bio

Dr. Caro is a native of northern Virginia and happy to be back and practicing in the area. She attended New York University for her undergraduate degree and ultimately ended up at the University of Pennsylvania for veterinary school. After graduation, Dr. Caro completed a one-year rotating internship at a local specialty hospital.

She currently practices primarily emergency medicine in the area and does occasional relief in general practice. When Dr. Caro is not working, she enjoys running, hiking, cycling, and spending time with family, including her dog, Cooper (a Boston Terrier), and her cat, Ripken.

Our Staff


Customer Service Representative

Colleen's Bio

Colleen is one of our client care specialists. She has always had a love of animals and has a passion for helping others and their pets. After going to school in West Virginia, Colleen decided that working with animals was her passion which led her to join the Sully Animal Hospital team.

In her free time, she enjoys traveling and being with her three cats, Macy, Merle, and Malley. Merle and Malley were adopted from our hospital after being brought to us as feral kittens. Colleen enjoys getting to know all of our clients and hopes that everyone has a great experience here. Her main goal is that everyone leaves with happy and healthy pets.


Customer Service Representative

Elizabeth's Bio

Elizabeth has been a military wife for the last 30 years. She has moved about every two to four years with her husband and two children. When her family moved to Colorado, she decided to see what working at an office was like and quickly enjoyed that as well. They eventually moved to Virginia after spending four years in Colorado Springs.

Elizabeth has always loved animals, especially cats, since she was very young. While living in North Carolina, Elizabeth worked at the local shelter and helped save over 200 kittens that were sent to rescue groups.

Upon moving to Virginia in May 2020 and taking some time to settle and visit family up north, Elizabeth decided it was time to get back to the animals. She has two cats and a black Labrador (all of which were rescued from shelters). When Elizabeth is not working or traveling to New Hampshire, she enjoys refinishing furniture and hunting for antiques.


Surgical Coordinator

Beth's Bio

Beth is a Virginia native currently attending Northern Virginia Community College. She plans to obtain a certification in veterinary practice management. Beth entered the animal care field, working for a family friend’s dog kennel, daycare, and training facility in 2019. After some time there, she discovered a passion for working with animals and left to begin a veterinary health field career. At the beginning of 2020, Beth began her journey at Sully Animal Hospital and has found a home here ever since.

When she isn’t scheduling and coordinating surgeries, she is writing music, helping out at her church, or cuddling her two beautiful Siberian husky sisters, Aspen and Shiloh, or her senior cat, Rex.


Licensed Veterinary Technician

Shannon's Bio

Shannon is a Licensed Veterinary Technician that has been a part of Sully Animal Hospital since September 2020. She is originally from upstate New York and earned her bachelor’s degree in environmental biology (wildlife) before starting her veterinary medicine career in 2000.

From general practice and exotics to hospital management and specialty medicine, Shannon has experience with it all. Her passion is in senior wellness, helping pets live their best lives in their golden years, as well as business development. In her free time, you can find Shannon hiking the local trails with her husband and German Shorthaired Pointer, Bella.



Emma's Bio

Emma is one of our wonderful veterinary assistants here at Sully Animal Hospital. As a child, she watched Animal Planet constantly and knew a career in animal healthcare was in her future. Emma received her undergraduate degree in biochemistry from Virginia Tech in spring 2018. She has been with us ever since!

On her days off, she loves to find Pinterest projects, acquire new hobbies, bake all kinds of food for her loved ones, and hang with her favorite furry pal, Murphy. Emma adopted Murphy from A Forever Home Rescue Foundation during summer 2019, and they’ve been best friends ever since.



Hannah's Bio

Hannah grew up in Portland, Oregon, surrounded by many furry friends, and always knew she wanted to work with animals. After graduating from the University of Oregon in 2019 with a degree in biology, Hannah moved to Washington D.C. after working as a veterinary assistant for a couple of years with the aim of attending veterinary school. Hannah enjoys seeing live music, painting, and spending time with her three rescue cats in her spare time.

Steven Perez



Steven's Bio

My name is Steven Perez, I graduated from Northern Virginia Community College from the Veterinary technician program in March 2021. I’ve been in the field for about 4 years now, I started as a kennel assistant and moved my way up to vet assistant. I will be taking my boards exam in March 2022 to become a Licensed Veterinary Technician now. My passion for animals started when I was 8 years old when my parents got me my first dog. Ever since I always wanted to be a part of the vet field where I can love and care for many animals. My end goal is to become a Veterinarian and will be pursuing that goal in the next year. Most people described me as a very caring and empathetic person who is willing to always help, and always willing to learn.