Love is the best Medicine

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Meet the Doctors


Stacy Santoro Binstock

DVM, DACVIM (Oncology)

Acupuncture & Oncology

Dr. Stacy Santoro Binstock is excited about joining the team at Lancaster Veterinary Specialties.  She will be offering oncology and acupuncture services.  She is a New Jersey native who completed her undergraduate degree in animal science at Rutgers University in 1997 and continued on to earn her veterinay degree from Iowa State University in 2002.  Following veterinary school, Dr. Binstock returned to New Jersey to complete a rotating internship at Red Bank Veterinary Hospital.  She moved back to the Midwest to begin an oncology residency at Kansas State University and finished the training at the University of Wisconsin in 2007.  After working at several specialty referral hospitals along the east coast, she now calls LVS and the Philadelphia suburbs home.

Dr. Binstock’s special interests include lymphoma/relapse therapy, mast cell tumors, molecular and minimally invasive diagnostics, acupuncture and holistic therapy, oral cancer, and advanced imaging of tumors.  She strives to offer the best possible care for each client by customizing a specific treatment plan to fit the needs of the owner and pet, along with providing the education and emotional support needed to go through the journey together.  She also works closely with primary care veterinarians to create a comprehensive care plan and support system.  In her spare time, Dr. Binstock enjoys spending time with her husband and children, cooking, reading, outdoor activities, and exploring farmers markets and festivals.  Her first “child” is a Chihuahua mix named Luigi.


Brian Bretz



Brian Bretz, DVM, DACVS is excited to join the team at Lancaster Veterinary Specialties.  Originally from California, he obtained both his undergraduate degree in veterinary science and his veterinary medical degree from the University of California, Davis.  Dr. Bretz also completed a rotating internship at Garden State Veterinary Specialists in Tinton Falls, New Jersey followed by a joint residency in small animal surgery at Tufts University and the MSPCA Angell Animal Medical Center in Boston, Massachussetts.  Dr. Bretz returned to school to obtain an MBA from the University of Chicago in 2016.

After becoming board certified by the American College of Veterinary Surgeons in 2010, he practiced at two referral hospitals in the greater Philadelphia area before joining Lancaster Veterinary Specialties.

Dr. Bretz excels in all aspects of surgery including soft tissue, orthopedic, neurologic, oncologic and minimally invasive procedures.  He has had the opportunity to lecture nationally and internationally on these topics.  Dr. Bretz looks forward to serving the pets, pet owners and family veterinarians in the greater Lancaster area.

When he’s not taking care of your pet, Dr. Bretz enjoys spending time with his wife, two small children, one dog and two cats.  When he’s not with his family or your furry family member, he enjoys running, scuba diving and traveling.  Welcome to the team, Dr. Bretz.


Simon Dennis

BVetMed, MVM, DECVIM (Cardiology)


Dr. Simon Dennis is a native of the United Kingdom and undertook his veterinary education at the Royal Veterinary College in London, graduating with his degree in veterinary medicine in 2000.  Dr. Dennis then completed an internship in small animal medicine and surgery at the University of Glasgow Veterinary School, where he also obtained a master’s degree in electrocardiography.  For the next 4 years, he worked in small animal practice in the south of England, in order to experience general veterinary practice.  Dr. Dennis then returned to the Royal Veterinary College in 2005, completing a residency in cardiology and becoming board certified in veterinary cardiology in 2008.  Subsequently, he worked as an academic cardiologist at the Royal Veterinary College and the University of Pennsylvania, and as a clinical cardiologist in the south of England, New York City and eastern Pennsylvania.  Since becoming a board-certified cardiologist, Dr. Dennis has been active in the education of veterinarians and veterinary cardiologists, veterinary research, and publishing of studies.  To this end, he has held the following positions: chair of the cardiology examination committee of the European College of Veterinary Internal Medicine; chief examiner of cardiology examinations for the Royal College of Veterinary Surgeons in the UK; Fellow of the Higher Education Academy in the UK; associate editor for the Journal of Small Animal Practice; associate editor for the Veterinary Medicine and Science; and a member of the external review board for the Journal of Veterinary Cardiology.

Dr. Dennis feels privileged to be able to combine the skills and experience from his time as a cardiologist, academic, educator, researcher and general practitioner in his role as clinical cardiologist at Lancaster Veterinary Specialties.  He is excited to be able to offer a comprehensive cardiology service to Lancaster county and beyond.  Dr. Dennis has the skills and experience to diagnose and manage a complete range of cardiac diseases in dogs and cats.  He enjoys a collaborative approach to case management with local veterinarians and the other specialists at LVS.

Dr. Dennis’s wife is a native of Lancaster county and they spend a lot of time with family in the area.  The have one daughter and their rescue cat, George Washington.  They have both been family for several other dogs and cats over the years.  Outside of work, Dr. Dennis and his family spend a lot of time traveling to beautiful places, doing outdoor activities, or attending any cultural or sports event.


Sarah Dowling


Internal Medicine

Sarah Dowling DVM DACVIM, is thrilled to offer compassionate and comprehensive Internal Medicine services at Lancaster Veterinary Specialties. She began her veterinary career with her DVM degree from the University of Illinois Champaign Urbana in 2011. In 2012 Dr. Dowling completed a rotating internship at the University of Minnesota. Continuing her tour of the Midwest, she then went on to complete a 3-year residency in small animal internal medicine at the University of Wisconsin Madison campus. After becoming board certified, Dr. Dowling came to the east coast and has been setting down roots in Lancaster since her arrival in 2015.

Dr. Dowling has a true passion for internal medicine, her patients, and their owners. She enjoys working closely with family veterinarians to provide seamless care for her patients. Dr. Dowling provides comprehensive internal medicine services for a wide range of health concerns using non-invasive or minimally invasive diagnostics to give you and your pet the answers you need and deserve. At the time of an internal medicine consultation Dr. Dowling will formulate a plan that works best for your pet and your family after a detailed history, examination, and review of your family veterinarian’s records.
Currently Dr. Dowling is renovating her farm house in Lancaster which has been an adventure. In her free time when she is not working on her home or gardening she loves to explore the beautiful countryside surrounding Lancaster with her dogs, Dexter and Corbin. She also has 2 cats, Mia and Delilah, who enjoy lounging in the bay window and grooming themselves in full view of the neighbors. She is very excited for the future at Lancaster Veterinary Specialties and for the opportunity to continue to provide the highest level of internal medicine care to you, your pets, and your family veterinarians!


Matthew Paek



Lancaster Veterinary Specialties has partnered with Dr. Paek of Synergy VIP to provide real-time board-certified radiology interpretations of our CT studies. Dr. Matthew Paek has earned both his bachelor’s and master’s degrees from Johns Hopkins University. He then went on to earn his veterinary degree from the University of Pennsylvania School of Veterinary Medicine in 2010. After completing a one-year rotating internship in medicine and surgery at a large private practice in New Jersey, he returned to the University of Pennsylvania for a three-year residency and completed his board certification as a Diplomate of the American College of Veterinary Radiology.

He enjoys all aspects of diagnostic imaging including radiology, contrast studies, ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI). His clinical areas of interest are advanced imaging of musculoskeletal injuries, central nervous system disorders, and oncological conditions. He has authored numerous scientific articles and textbook chapters, and regularly gives lectures at regional and national continuing education conferences.

In his spare time, Dr. Paek enjoys spending time with his family, traveling, watching Philadelphia sports teams, and grilling on his Big Green Egg.


Damon B. Rodriguez


Internal Medicine

Dr. Rodriguez received a bachelor degree from Cornell University in mathematics in 1993 and his doctorate of veterinary medicine from the University of Florida in 1997. Dr. Rodriguez headed back north to Boston where he completed a one-year internship in medicine and surgery at Angell Memorial Animal Hospital. After 2 years in general practice he completed a three-year residency in small animal internal medicine at Mississippi State University and became board certified in small animal internal medicine in 2003. Dr. Rodriguez practiced at two large referral practices in Cincinnati and Philadelphia until he formed his own specialty group in Lancaster in 2012. Lancaster Veterinary Specialties (LVS) now serves as the only full-service specialist owned referral practice in Lancaster and surrounding counties west of Lancaster.

Dr. Rodriguez feels very fortunate to have the privilege of being surrounded by an incredible group of specialists and veterinary nurses that serve the community with passion, love, and a family mentality. Dr. Rodriguez and LVS treat every referred person and pet as if they are part of our own family.

Dr. Rodriguez’s interests within the discipline of internal medicine are broad and include endocrinology, hematology, oncology, cardiology, and infectious disease. He has published articles in several professional journals and has given talks at both the local and national levels. Dr. Rodriguez performs numerous specialized procedures which include but are not limited to gastroduodenoscopy, colonoscopy, rhinoscopy, bronchoscopy, cystoscopy, abdominal ultrasound, echocardiography, contrast radiographic studies, PEG tube placement, ultrasound guided biopsies, and bone marrow aspirates/biopsies.

When not serving clients and patients, Dr. Rodriguez spends as much time as possible with his wife of over 25 years and three children. Important members of Dr. Rodriguez’s family also includes his dog and chickens.