MEET THE TEAM
We’re a team of animal lovers, just like you. We know the joy of a cold nose nudging your hand, the sound of paws on the floor when you come home, and the quiet comfort of a pet just being close. That’s why we approach veterinary care with gentleness, patience, and a whole lot of heart. We take the time to get to know you and your pet — their quirks, their story, and what makes them special.
Our space was designed to feel like home: warm smiles at the front desk, calming vibes in every room, and a team that truly listens. Whether you’re visiting for a wellness check, a sudden concern, or just some peace of mind, you can count on us to be here — ready with the expertise your pet deserves and the compassion you both need.
Meet the founder
Dr. BreAnne Feldman Losik
Dr. Bre grew up surrounded by veterinary medicine and business ownership. Both her father and grandfather are/were veterinary practitioners, entrepreneurs, and successful business owners. This exposure to veterinary medicine and the varied business opportunities within the profession helped to shape her education and career. Dr. Bre received her Doctor of Veterinary Medicine from Iowa State University in 2008. She went on to complete a small animal rotating internship followed by several years in ER/specialty medicine before transitioning to private practice ownership and partnership of four hospitals across the Chicagoland area. Partnership and management in these hospitals further fueled her drive for entrepreneurship and business growth.
In 2017 she co-founded 4 Paws Imaging, a mobile company for ultrasound and echocardiogram which provided the ability for diagnostics to stay with the primary practitioner. In the last five years 4 Paws Imaging has grown to service over 165 hospitals in Chicagoland with 8 trained/certified sonographers, and is still actively growing. In 2021 she and her partners launched Elite Veterinary Teleradiology, a remote teleradiology company dedicated to imaging interpretation.
After 10 plus years in partnership, Dr. Bre is shifting her focus to founding Radiant Veterinary in Naperville. It is very important to Dr. Bre to maintain empathetic, quality medicine and (she) is excited to bring privately owned compassionate care with cutting edge diagnostics to the pets and families of north Naperville.
In addition to Dr. Bre’s varied business pursuits, she sits on the board of Tiny and Tall Chicagoland rescue. She strives to be an example for women in business, leadership, and veterinary medicine, showing by example that it is achievable, feasible, fulfilling, and rewarding.
Along with her husband, Rob (a native of Naperville), they have two children and two dogs. Being a veterinary entrepreneur and mother keeps her very busy but she still tries to find time for reading a good book, gardening, or going for a run.
Mike McCallion
VETERINARIAN
Dr. Mike grew up in Darien and earned a biology degree from Augustana College before receiving his Doctor of Veterinary Medicine from the University of Illinois College of Veterinary Medicine. He focuses on minimally invasive procedures, including laparoscopic spay procedures and laparoscopic-assisted gastropexies. Dr. Mike also works with sled dogs in races such as the Iditarod in Alaska.
In his free time, he enjoys hiking, traveling—especially visiting U.S. National Parks—and spending time with his family. He has a variety of pets, including a Husky/Beagle mix named Nala and three frogs.
Dr. Mike values the long-term relationships he builds with pet owners and their animals.
Karen Kunst
Karen has been in the Veterinary field since 2009, having attended the Veterinary Technician program at Winsted Community College in Winsted Connecticut. She started her journey at Bolton Veterinary Hospital, as an Outpatient Technician. After moving to Illinois in 2015, she continued her journey as an Emergency Technician at CARE Animal Emergency Service.
In 2018, Karen joined the management team there as an Assistant Manager, before transferring to Hospital Manager at Foxmoor Veterinary Clinic in 2020. Foxmoor was a part of National Veterinary Associates, therefore, she was able to work for corporate veterinary medicine before deciding private practice would allow her to focus more on personal patient care vs. corporate finances.
OPERATIONS MANAGER
Mackenzie N.
Mackenzie has been dedicated to the veterinary field for over 12 years, combining her clinical experience with a deep passion for marketing and graphic design. She is a lover of all large breed dogs including her Newfoundland and her Cane Corso mix. She has a special interest in canine nutrition, emphasizing the importance of tailored diets.
When asked about her ideal day, Mackenzie describes a sunny summer Saturday spent relaxing with her boyfriend and their families.
CERTIFIED VETERINARY NURSE
Kathleen M. Z.
Kathleen has been in veterinary medicine for 17 years and provides a wealth of experience and dedication to her work. She has a strong passion for dentistry and enjoys caring for the oral health of dogs and cats of all breeds. Kathleen is also board-certified in canine massage therapy.
Outside of the clinic, Kathleen loves to plant in her garden, reading, and visiting museums. She especially enjoys the fall season and spending all the cozy moments with her kids, husband, and mother.
CERTIFIED VETERINARY NURSE
Ari D.
Ari has been in veterinary medicine for 16 years and with that, she has obtained experience while providing compassion to every patient she cares for. She has a special interest in senior pet care, dentistry, and anesthesia / pain management. Ari also has a strong passion for working with fearful pets, using Fear Free techniques to build trust and create meaningful connections with them.
Ari enjoys spending her free time with her husband, their corgi, Motley, and their two cats, Metallica and Skully.
CERTIFIED VETERINARY NURSE
Jace V.
Jace has 10 years of experience in veterinary medicine, specializing in anesthesia and surgery, and is currently pursuing her VTS in anesthesia. She works at VEG and Radiant Veterinary, covering both emergency and general practice cases. She particularly enjoys managing chronic pain and has a soft spot for German Shepherds and other working breeds.
At home, Jace loves spending time with her husband and son, training her dogs, playing video games, reading, and enjoying movie nights with her family.
CERTIFIED VETERINARY NURSE
Carlie S.
VETERINARY ASSISTANT
Carlie has been in veterinary medicine since 2018, working in emergency care and at Radiant Veterinary. Carlie is nearing completion of her CVT license and will shortly be sitting for her board exam. She has a special love for bearded dragons, Chihuahuas, and Persian cats. Her favorite emergency cases to work up are those that involve managing blocked cats.
As a true sports fan, Carlie’s favorite movie is A League of Their Own. She loves watching softball, basketball, and all things sports.
Lindsey V.I.
GROOMER
Lindsey has been a professional groomer for two years and brings both skill and heart to her work. She shares her life with Atlas, her Pyrenees mix, whom she adopted while attending grooming school. Her favorite breeds to groom are Pomeranians and Golden Retrievers.
Originally from Minnesota, Lindsey grew up with a love for the outdoors and the arts. While playing stand up bass for 8 years, she developed deep appreciation for classical music. In her free time, you can find her spending time outside, training Atlas, or getting lost in a good book.
Amber M.
Amber has been a professional groomer for eight years and has a special love for grooming doodles. She takes pride in helping each dog look and feel their best, bringing patience and experience to every appointment.
Outside of grooming, Amber enjoys reading, listening to music, and exploring great food. A lifelong book lover, she once dreamed of becoming a librarian. Most of her time these days is happily spent raising her daughter and caring for her two dogs, balancing family life with the career she loves.
GROOMER
OUR VALUES
Inclusion/Warmth: We believe every client and patient should feel genuinely seen, heard, and valued. From the moment you walk through our doors, you’ll be welcomed into a space designed to reflect comfort and respect- for all backgrounds, identities, and beliefs. Our team is committed to cultivating meaningful connections with both pets and people, ensuring every visit feels less like a transaction and more like a trusted partnership rooted in kindness and warmth.
Excellence in Care: We hold ourselves to the highest standards of medical and surgical excellence because your pet deserves nothing less. Our clinical decisions are evidence- based, detail-oriented, and guided by the latest in veterinary science. Every member of our team is relentlessly dedicated to professional growth and clinical precision, delivering care that’s not only thorough and cutting edge, but always tailored to the unique needs of each patient.
Integrity: Trust is the cornerstone of everything we do. At Radiant Veterinary, integrity means complete transparency, honest communication, and doing what’s right, even when no one is watching. We advocate for what’s best for your pet, not what’s easiest or most profitable. Our clients can count on ethical recommendations, clear explanations, and a level of care that reflects both our moral compass and our deep sense of responsibility.