We’re a team of animal lovers, just like you.
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.
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.
Meet Our Founder
Dr. BreAnne Feldman Losik
Dr. Mike McCallion
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.
VETERINARIAN
Dr. Sara Kessel
Dr. Sara Kessel likes to say she was “raised under Dr. Bre,” having joined her immediately after graduating from veterinary school and continuing to work alongside her throughout her first five years in practice. Now, with 10 years in veterinary medicine, Dr. Sara has developed a special passion for soft-tissue surgery and senior pet care. Her favorite cases are geriatric cats, and she finds it especially rewarding to help older pets feel comfortable and enjoy their golden years.
Dr. Sara loves spending time with her family and shares her home with two dogs, Luke and Dolly, and a cat named Skittles. In her free time, she enjoys running along Chicago’s lakefront, reading, and learning Portuguese.
VETERINARIAN
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 as an Assistant Manager, before transferring to Hospital Manager at Foxmoor Veterinary Clinic in 2020. There, 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
Jace R.
CERTIFIED VETERINARY NURSE
Jace brings 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.
LEAD NURSE
Mackenzie N.
CERTIFIED VETERINARY NURSE
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. Mackenzie utilizes that passion in her role as the marketing director of Radiant Veterinary. She is a lover of all large breed dogs including her Newfoundland and her Cane Corso mix.
When asked about her ideal day, Mackenzie describes a sunny summer Saturday spent relaxing with her boyfriend and their families.
MARKETING DIRECTOR
Mary brings 12 years of veterinary medicine experience to Radiant, along with a special passion for feline nutrition and enrichment. When asked what gets her through the day, she replied, “Diet soda, coffee, and helping pets have better lives!”
At home, Mary’s life revolves around her three cats - Moose, Myrtle, and Waffles - and a 20-gallon fish tank home to 13 fish and a snail named “Shel Silverstein”. When she isn’t caring for animals, you’ll find her reading, playing video games, or enjoying a movie night with her husband.
Mary G.
CERTIFIED VETERINARY NURSE
With six years of experience in veterinary medicine, Kara has developed a special interest in radiology and surgery. One of her favorite cases involved helping successfully repair a puppy’s limb after a birth injury...a rewarding experience that reminded her just how meaningful veterinary medicine can be.
Kara has a soft spot for Pit bulls and Maine Coons and is fueled by coconut Red Bulls. When she isn’t helping animals, she enjoys watching movies with her 3-year-old son or catching up on the newest Criminal Minds episode with her pup, Remy.
Kara L.
CERTIFIED VETERINARY NURSE
With 13 years in veterinary medicine, Molly has done it all from shelter medicine, general practice, emergency, and everything in between. Emergency medicine stole her heart thanks to the fast pace and unpredictability. She loves German Shepherds, has a soft spot for black cats, and dreams of owning a white tiger someday.
She thrives in the chaos, runs on coffee, and somehow keeps it all together while being a loving and devoted mother to 3 boys, 2 dogs, and 2 cats.
Molly H.
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.
Carlie S.
VETERINARY ASSISTANT
Meet Maribel, the friendly face behind the front desk at Radiant Veterinary! As our Customer Service Representative, she’s been part of the veterinary field for 9 years and loves helping both pets and their people feel right at home. She has a soft spot for Labs and dilute calicos, and recently stepped into her newest role as a mother!
Outside of the clinic, Maribel loves spending time with her husband and 6-month-old daughter exploring museums, aquariums, and zoos together.
Maribel G.
CUSTOMER SERVICE REPRESENTATIVE
Radiant Grooming
Yoana B.
DOG & CAT GROOMING
With 10 years of grooming experience, Yoana has a soft spot for cats, especially those who need a little extra patience. She has extensive experience working with anxious pets and uses a Fear Free approach to help them feel safe and comfortable throughout their grooming visits. Her favorite part of the job is helping pets look and feel beautiful while keeping their comfort the top priority.
Outside of work, Yoana is probably sipping coffee, watching horror movies, Harry Potter, or anime…but her favorite way to spend her time is with her girls.
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.