Meet Our Veterinarians

We’re proud to call such a capable and knowledgeable veterinary team our own. To get to know our amazing vets, check out their bios below.

Click and drag the small arrow from right to left to learn a little something extra about them.

Dr. Brad Jeffrey

Owner

On the Job:

Dr. Jeffrey started Jeffrey Animal Hospital in 1982, beginning with house calls. He received his Bachelor of Science degree and Doctor of Veterinary Medicine degree from Michigan State University, and is a member of both the American Veterinary Medical Association, and the Michigan Veterinary Medical Association. He is semi-retired.

Off Duty:

After over 30 years of working as a veterinarian and spending the last 5 years working with several rescue organizations, Dr. Jeffrey is semi-retired. He enjoys life on the lake with his family and 2 Havanese dogs.

Dr. Athena Demetriou

On the Job:

Within her field of medicine, Dr. Demetriou is especially interested in internal medicine and small animal surgery. She has been at Jeffrey Animal Hospital since 1991. She received both her Bachelor of Science degree in Biology and her Master’s degree in Environmental and Evolutionary Biology from Wayne State University, and earned her Doctor of Veterinary Medicine degree from Michigan State University. She is a member of the American Veterinary Medical Association, and the Michigan Veterinary Medical Association.

Off Duty:

While veterinary medicine may be Dr. Demetriou’s first love, caring for her personal menagerie is a close second. She is owned by her 2 rescued dogs, 3 cats, 1 ball python, 2 leopard geckos, 1 rabbit, 1 box turtle, 2 African clawed frogs, and many, many birds and fish. She loves to read, garden, and travel.

Dr. Nancy Bialach

On the Job:

Dr. Bialach’s reason for becoming a veterinarian is age-old: she loves animals. As a veterinarian, her goal is to diagnose, treat, and monitor patients to ensure they “feel great for as long as possible.” She is especially interested in diagnostics and internal medicine, and has been with Jeffrey Animal Hospital since 1989. She earned her Bachelor of Science degree and her Doctor of Veterinary Medicine degree from Michigan State University. She is also a member of the American Veterinary Medical Association and the Michigan Veterinary Medical Association.

Off Duty:

When not helping ill or injured patients in the hospital, Dr. Bialach enjoys spending time with her husband and solving the hardest crossword puzzles you’ve ever seen! Her rescued cat, Fatty, has no hobbies.

Dr. Andrea Zelten

On the Job:

After graduation from Michigan State University, Dr. Zelten worked for several years in Maine and North Carolina before returning to her home state of Michigan. Dr. Zelten has been with Jeffrey Animal Hospital since 2008. She enjoys improving the quality of life and health of animals in order to strengthen their bond with their humans. Dr. Zelten is very committed to continuing education. She is a member of the American Veterinary Medical Association, the Michigan Veterinary Medical Association, and the Southeastern Michigan Veterinary Medical Association.

Off Duty:

Outside of Jeffrey Animal Hospital, Dr. Zelten shares her life with her 4 children, 1 grandchild, 2 dogs, 2 cats, and 2 guinea pigs. She also appreciates spending time outdoors, hiking and kayaking.

Dr. Margaret Muns

On the Job:

Dr. Muns has enjoyed a decades-long association with Jeffrey Animal Hospital, and is now semi-retired. She still has a strong passion for helping clients and their pets preserve the special bond they have. Her practice interests include internal medicine, behavior, and nutrition, with special focus on anything and everything feline. Dr. Muns received her Bachelor of Arts degree from Kalamazoo College, and obtained her Doctor of Veterinary Medicine degree from Michigan State University.

Off Duty:

In her free time, Dr. Muns enjoys dabbling in digital painting and 3D computer graphics. She also likes watching birds and wildlife while walking in area parks.