DR. HAL HAWKINS, DVM
Medical Director

Dr. Hawkins grew up in the small town of Bartow, Florida where he spent much of his youth playing sports, raising cattle, and working in family citrus groves. He attended the University of Florida where he obtained a degree in Animal Science as well as his Doctorate of Veterinary Medicine in 2008.

Drawn by ample outdoor opportunities he then moved to Santa Rosa to complete a small animal internship where he developed skills in surgery, dentistry, and emergency medicine while excelling in general practice. Dr. Hawkins remained at this practice for over 12 years, deepened his bond with the local veterinary community, and in the latter half gained valuable experience as the hospital director.

In 2021 Dr. Hawkins joins Northtown Guardian to focus on providing high quality compassionate care directly to his patients. With a primary goal of preventive care he is also well versed in unforeseen emergencies and can help you and your family pet through problems both large and small. He is excited to be a part of a growing team dedicated to the community and rebuilding from the 2017 wildfire.

In his free time Dr. Hawkins enjoys all things outdoors but particularly urban homesteading, vegetable gardening, backpacking, kayaking, skiing, and spending time with his family – wife Mary, and two daughters Maeve and Hazel.

DR. JOY MUELLER, DVM, CVMMP
Associate Veterinarian

Dr. Joy Mueller, DVM, CVMMP started Guardian Pet Hospital in 1990. She wanted to be a part of this lovely community and help your pets be a happy and healthy part of your family.

Dr. Mueller treats dogs, cats, rabbits and various pocket pets and gives personal, high quality, individualized attention to each and every one. Her emphasis is on preventative medicine to improve the longevity and happiness of your pets. Dr. Mueller is now certified in Veterinary Medical Manipulation, a gentle, hands-on “chiropractic” like adjustment of back and limbs for small animals. She has worked with Forgotten Felines for 20 years and is very experienced in cats’ special needs.Dr. Mueller also trains and trials her Australian Shepherds in agility and has done flyball, freestyle dance and canine nose work. She can help keep your competition dog at peak performance!

DR. RACHEL MARCUS, DVM
Associate Veterinarian

Dr. Marcus spent most of her childhood on Bainbridge Island, Washington. She then traveled across the Sound to Seattle where she received a bachelor of science majored in Environmental Health at the University of Washington in 2009. After spending a few years working in the medical and veterinary field, she headed eastward to Pullman, WA where she earned her Doctorate in Veterinary Medicine at Washington State University in 2017. She and her husband relocated to Santa Rosa afterward where they have happily lived ever since. They share their home with two dogs, three cats, and 6 hens. When not working, you may find her in the great outdoors exploring all that NorCal has to offer or tending to her flock and garden.

Dr. Marcus’s veterinary interests include internal medicine, surgery, dentistry, and behavioral medicine. She recognizes that for some pets and owners, a visit to the vet can be stressful. Through her extensive behavioral medicine background and Fear Free training, she is committed to making all pet’s visits to Northtown Guardian Pet Hospital as stress-free as possible.

DR. BREE GESSEN, DVM
Associate Veterinarian

Dr. Bree Gessen is a UC Davis School of Veterinary Medicine graduate and internship trained veterinarian. She has been practicing for over a decade in Sonoma County. Her interests in veterinary medicine are broad, and include dermatology, dentistry, emergency medicine, and general surgery. She especially enjoys building relationships with people and their pets from puppy and kittenhood on. Dr. Gessen is a Los Angeles native. She grew up near the beach, where she would often find (or chase) her dogs when they escaped. She is an avid snow boarder and has loved snow sports since she was a child. She enjoys succulent gardening (her husband might say she has a problem), being outdoors, and living in wine country. Her two tabby cats share their home with Dr. Gessen, her husband, their spirited toddler, a special black lab/golden retriever, and many many plants.

DR. ELIZABETH ENGALL, DVM
Associate Veterinarian

Dr. Elizabeth Engall grew up on the peninsula then attended college at UC Davis where she studied psychology. Afterwards she worked in neuroscience where she met the love of her life and discovered her passion for veterinary medicine. Dr. Engall earned her DVM from UC Davis where she helped found a volunteer veterinary clinic in Nicaragua and served as class president. After school she moved to San Diego where she enjoyed the warm Southern California beaches, however, after having her first child and the beginning of the pandemic she decided to move home to the Bay Area. After a short time in the East Bay she settled down in Sonoma County where she lives with her husband, active kindergartener, and equally active toddler! Dr. Engall's last dog, Flash, was an amazing golden retriever who broke her heart when he left the world, but she's sure the next right pup will make its way into her life when the stars align.

DR. EMILY LANE, DVM
Associate Veterinarian

Dr. Lane is a UC Davis graduate who left the Central Valley for more rain and wine in her life. During her time in veterinary school she specialized in poultry medicine, small animal medicine, and surgery. Dr. Lane loves dogs, cats, and chickens. Outside of work she enjoys quilting and hiking, although she had not yet figured out a way to combine these interests. Emily has two cats, Jon Snow and Mona, who between them have nearly every medical problem possible! She looks forward to meeting you.

DR. KEVIN EXELBY, DVM
Associate Veterinarian

Dr. Kevin Exelby was born and raised in Santa Rosa. He graduated from the University of California, Davis with a bachelor's degree in Animal Science and an emphasis in Genetics. After working as a veterinary assistant for three years he returned to UC Davis for veterinary school. He is particularly interested in surgery, oncology, and diagnostic imaging. In his free time he enjoys hiking, gardening, and spending time with his wife, their two dogs and two cats.

MICHELLE
Hospital Manager

With 30 years of experience in the veterinary field, Michelle has had the privilege of working across a variety of settings, including specialty care, emergency services, and general practice. Michelle's true passion lies in the human-animal bond, and is deeply committed to providing compassionate care that strengthens these relationships.

Michelle thrives in team environments, and always seeks opportunities to contribute and offer help where it’s needed most. Whether it’s in a fast-paced emergency situation or a more routine check-up, the goal is to be of maximum service to both animals and their families.

Outside of work, Michelle is an avid animal lover and proud dog parent to a 5-year-old mixed breed. When not working, you’ll often find Michelle hiking through the stunning landscapes of Sonoma County, crocheting, or simply enjoying the beauty of the outdoors. Michelle believes in a balanced life and cherishes the moments spent with her canine companion.