Dr. George L. Hartenstein IV

Veterinarian

Partner since January 1968

Dr. Hartenstein is a graduate of Gettysburg College and the University of Pennsylvania School of Veterinary Medicine.  He is the son of the late Hill Street Veterinary Hospital founder, Dr. George L. Hartenstein III (Doc).  Since graduating in 1968, Dr. Hartenstein focused his career on large animal medicine.  He traveled from farm-to-farm, working with local farmers attending to both the medical and surgical needs of our large animal friends.  In his journey towards retirement, Dr. Hartenstein works as a consultant to other Hill Street veterinary professionals as well as provides administrative support for the hospital.

Outside his life-long dedication to animals, Dr. Hartenstein enjoys Formula 1 racing and traveling.  One of his favorite adventures includes trips out west to participate in the Native American Veterinary Services (NAVS) program sponsored by the University of Pennsylvania.  Through NAVS, volunteers provide veterinary services to the farm and companion animals of Native Americans who would otherwise have access to little or no veterinary care.

Dr. Sara Alfano

Veterinarian

Partner since January 2018

Dr. Alfano is a graduate of Bucknell University and the University of Pennsylvania School of Veterinary Medicine. Immediately following veterinary school, she completed an Equine Field Service internship at the University of Tennessee. She joined Hill Street Veterinary Hospital as an Associate in June of 2015. In January of 2018, she became a Partner.

Dr. Alfano has a passion for all veterinary medicine, but her primary focus is on companion animal medicine and surgery. In her spare time, she loves to run, swim, cook, walk her rescue dog Rainey, and spend time with her husband and two children.

Dr. Lauren Feroli

Veterinarian

Partner since January 2019

Dr. Feroli is a graduate of Pennsylvania State University and the Cummings School of Veterinary Medicine at Tufts University.  She joined Hill Street as an Associate in June of 2016.  She became a partner in January of 2019.

Dr. Feroli has extensive experience in canine and feline medicine, with a preferred focus on feline geriatric care.  She is an exotics and avian enthusiast with experience in wellness and preventative care.  In her free time, she enjoys caring for her children and her birds and cats.

Dr. Faith Roser

Veterinarian

Associate since May 2020

Dr. Roser graduated from Drexel University and the University of Pennsylvania School of Veterinary Medicine. She joined Hill Street as an Associate in May of 2020.

Dr. Roser is a mixed-practice clinician, caring for both companion animals (cats and dogs) as well as some farm animals. She has a special interest in the preventative care of small ruminants (sheep and goats). In her free time, she enjoys reading and writing, cooking, tending to her orchids and vegetable gardens, horseback riding, and playing with her sheep and cats.

Louisa Hartenstein

Manager

Partner since July 2017

Ms. Hartenstein is a graduate of the University of Delaware.  She joined Hill Street Veterinary Hospital in 2002 as the Office Manager.  Daughter of Dr. George Hartenstein, Louisa has benefited from the influence of three generations of veterinarians.  Growing up on a horse farm in the southern part of York County, she has watched the County and the field of veterinary medicine evolve.  In 2017 she became Managing Partner.