Meet Our Doctors
Dr. Julie Baker grew up her entire life in the Hampstead area, playing soccer, basketball, and softball and riding horses. She spent many hours volunteering at Manchester Veterinary Services to gain veterinary experience during her high school years. She graduated from McDonogh School and then Virginia Tech, playing competitive soccer at both institutions. She attended the VA-MD Regional College of Veterinary Medicine and graduated in 2004. She has worked at Manchester Vet for the past 16 years and currently lives in Hampstead with her husband, Dr. Callahan, and their two daughters. Her primary interests are managing patients with long term medical conditions and hospice care.
Dr. Jeff Callahan grew up in Baltimore County. As long as he could remember, he always wanted to be a veterinarian. He graduated from Towson High School and attended the University of Delaware where he fell in love with large animal medicine, working on all aspects of the college farm. He graduated with a BS in Agriculture and went on to attend the VA-MD Regional College of Veterinary Medicine. He graduated vet school in 2004 and started practicing large animal medicine in southern PA and north-central MD. After 5 years of large animal work, he and his wife Dr. Baker purchased Manchester Vet, where he adopted the role of small animal vet. Dr. Callahan's primary interests are surgery and ultrasound. He currently lives with his wife Dr. Baker and their two children in Hampstead, and spends his free time competing in ultramarathons and obstacle course races.
Dr. Jan Wimer grew up in McLean Virginia. She earned a Bachelor's degree in Animal Science from Virginia Tech, and graduated from Mississippi State University College of Veterinary Medicine in 1998. She started practicing in mixed animal practice upon graduation, and joined the Manchester Vet team shortly thereafter. Dr. Wimer currently shares her talents between three different regional clinics, these days focusing on dogs and cats, but with a special interest in feline medicine. She currently lives in Taneytown with her husband and two children. Their farm is home to just about everything you could imagine - beef cattle, horses, dogs, cats, chickens, and ducks.
Dr. Gabby Leather grew up in Carroll County and graduated from North Carroll High School. She has been a part of the Manchester Vet family for many, many years, where she worked to gain her experience in veterinary medicine. She obtained her Bachelors degree from St. Mary's College of Maryland, then a Masters degree from Towson University, before attending Lincoln Memorial College of Veterinary Medicine in Tennessee to earn her veterinary degree. Her primary interests are small mammal medicine and feline medicine. In addtional to cats and dogs, Dr. Leather also treats rabbits, guinea pigs, ferrets, chinchillas, hedgehogs, rats, mice, and gerbils! Outside of veterinary medicine, her interests include reading, houseplants, and spending time with her pets.
Dr. Elizabeth Hall is a native of Hanover, PA. She went to Delone Catholic High School and then to Franciscan University where she graduated with a Bachelor’s degree in Biology and a Minor in Psychology. She completed her veterinary medicine studies in Tennessee at Lincoln Memorial University where she graduated in 2022. Her favorite things in life are her Faith, her family, and of course animals. She also loves to write, sing, and play music on her guitar and flute and flip around on the trampoline, as she used to be an avid gymnast. She is married to her wonderful husband Seth and they have a 2 year-old daughter (Maggie) and a baby boy due in September. She also lives with her two dogs Millie and Boe (a calm Husky and a crazy Collie). Her special interests in veterinary medicine include behavior, internal medicine, and clinical pathology.
Meet Our Staff
Lisa Stumpf - Practice Manager
Lisa joined Manchester Veterinary Services as Practice Manager in June 2024. She grew up in Baltimore County and moved to the Hereford Zone, bringing over 24 years of experience as a Vet Tech, five years in tech management, and three years in hospital management to her role.
Lisa has worked in emergency, critical care, intensive care, wellness, and surgical settings. She loves building strong relationships between the veterinary team and their patients and clients.
After years in high-stress environments, Lisa sought a practice offering gold-standard care with a better work/life balance. At Manchester Veterinary Services, she found a true family atmosphere, where the team works hard and goes above and beyond for patients while valuing personal time.
Married for over 20 years, Lisa is a proud mother of five children ranging from elementary to college age. In her spare time, she enjoys learning about history, visiting museums, shopping, and exploring theme parks.
Her household includes three dogs (Steeve, Bucky, and Dinah), four cats (Potter, Zuri, Kevin, and Bubbles), a flock of chickens, and a rooster, Keith Morrison.
Lisa joined Manchester Veterinary Services as Practice Manager in June 2024. She grew up in Baltimore County and moved to the Hereford Zone, bringing over 24 years of experience as a Vet Tech, five years in tech management, and three years in hospital management to her role.
Lisa has worked in emergency, critical care, intensive care, wellness, and surgical settings. She loves building strong relationships between the veterinary team and their patients and clients.
After years in high-stress environments, Lisa sought a practice offering gold-standard care with a better work/life balance. At Manchester Veterinary Services, she found a true family atmosphere, where the team works hard and goes above and beyond for patients while valuing personal time.
Married for over 20 years, Lisa is a proud mother of five children ranging from elementary to college age. In her spare time, she enjoys learning about history, visiting museums, shopping, and exploring theme parks.
Her household includes three dogs (Steeve, Bucky, and Dinah), four cats (Potter, Zuri, Kevin, and Bubbles), a flock of chickens, and a rooster, Keith Morrison.
