Our Staff

Our staff is constantly growing; not just in numbers, but in expertise as well. We are home to a family of doctors that are equipped to meet all of your pet’s needs and are deeply invested in their patient’s health. Our veterinarians each have their own unique areas of interest, making Newtown Vet an even more dynamic and well-rounded hospital.

Timothy J. Ireland, VMD


Born and raised in Northeast Philadelphia, Dr. Ireland graduated from the University of Pennsylvania’s School of Veterinary Medicine in 1990. After graduating, Dr. Ireland found a job at Newtown Veterinary Hospital, and then purchased the practice from previous owner Fred Guenther, VMD in 1992. He is passionate about all aspects of veterinary care but finds soft tissue, orthopedic surgery and dentistry to be the most enjoyable. Dr. Ireland has served on the board of the Pennsylvania Veterinary Medical Association, the largest organized group of veterinarians in PA: as VP in 2003, President-elect in 2004, and President in 2005.

Outside of the office, Dr. Ireland spends as much time as possible with his wife, Lynda, his son, Timmy II, and his two daughters, Abby and Angelina. Like any family of animal lovers, the Irelands have opened their home to a variety of pets, including Sandy the Golden Retriever, Phoebe the parrot,  three cats named Puppy, Silver and Inky, three bearded dragons, a flock of chickens, and even two cows named Milkshake and Buttercup.

Lizzy Bairstow, VMD

Dr. Bairstow grew up in the San Francisco Bay Area. She discovered her passion for veterinary medicine through her work at an aquarium during college where she cared for all creatures great and small! After graduating from Loyola Marymount University in Los Angeles, she moved to Philadelphia to pursue her dream of becoming a Veterinarian. She attended the University of Pennsylvania School of Veterinary Medicine and Philadelphia has become her second home.

Dr. Bairstow joined us in 2018 after post doctorate training in emergency medicine. She loves the opportunity that Newtown Vet gives her to develop long-lasting relationships with her patients and clients as well as focus on preventative care. Her special interests in veterinary medicine include ophthalmology and internal medicine. Outside of work, she enjoys hiking, traveling and a good cappuccino. She lives in Philadelphia with her fiancé, Mike, their rescued senior cat, Richard Parker, and their golden retriever, Cricket.

Jaaron Graham, DVM

Dr. Graham is from a small town in Western Pennsylvania just north of Pittsburgh. After high school, he attended Tufts University in Massachusetts, spent a year in the UK doing coursework in Biochemistry, and returned to Tufts to complete his undergraduate degree in Biology. He then spent some time doing research in molecular biology before starting at Tufts Veterinary School in 2001.

During veterinary school, Dr. Graham received a military scholarship and after graduating he immediately began military training and assumed the position of a Veterinary Corps Officer (VCO) for the US Army. After serving some time in Virginia and South Korea, Dr. Graham completed his contract with the military and became part of the Newtown Vet family.

Karen Kohler, DVM

Dr. Kohler grew up in suburban Philadelphia. She received her undergraduate degree from Harvard University and her DVM from Purdue University. Dr. Kohler enjoys all aspects of small animal practice, but she has an especially strong interest in soft tissue and orthopedic surgery.

Presently, Dr. Kohler resides in New Jersey, on a dairy farm with her family, their dog, and numerous cows, horses, and cats. In her free time she helps with the farm work and enjoys cooking and gardening.

Judith E. Palm, VMD

Dr. Palm was a New York City native who came to this region in 1986 after college. She is a 1990 graduate of the University of Pennsylvania School of Veterinary Medicine and a classmate of Dr. Ireland. A true cat lover, Dr. Palm has also practiced at cat-only hospitals in Philadelphia and New York before joining Newtown Vet. She is particularly interested in feline health and the challenges cat owners face when trying to provide consistent, stress-free veterinary care for their pets.

Angela Summers, VMD

Dr. Summers was born and raised in Indianapolis, IN. She graduated with honors from the University of Richmond with a B.S. in Biology in 1997 and later graduated from the University of Pennsylvania, School of Veterinary Medicine in 2002, after which she immediately joined the Newtown Vet family. Dr. Summers’ position at Newtown Veterinary Hospital grants her the opportunity to practice high quality medicine and build lasting relationships with her patients and their families.

Dr. Summers is very interested in canine behavior. While earning her degree, she worked in the Behavior Clinic at the Veterinary Hospital of the University of Pennsylvania. There Dr. Summers observed that behavior problems in the pet population are very common and can often result in the owner surrendering the pet to a shelter or even euthanasia. She feels that this can often be avoided through proper training and behavior modification as the problems develop.