The Doctors

Andrew C. Sloyer, DVM

Hello, I am Dr. Andrew Sloyer. After graduating from Franklin and Marchall College and the University of Tennessee College of Veterinary Medicine, I practiced in Gilbertsville, PA. I started at Neffsville Veterinary Clinic in May 2000.

I see patients on a daily basis and have special interests in orthopedic surgery and knee surgery.

I lead our team in orthopedic surgery. We do the tibial tuberosity advancement technique (TTA) for dogs with anterior cruciate ligament disease, especially dogs over 60 pounds.

We are seeing excellent results with dogs returning to normal function more quickly.

We continue to perform the lateral suture technique for small and medium dogs for repair of ruptured anterior cruciate ligament and also medial patellar luxation repair.

I love seeing animals being able to return back to the activities they love after successful knee surgery.

When I am not helping our patients, my wife Kristina and our two sons, Clark and William enjoy spending time on our family farm.

We have two terriers (Isabelle and Winston), two cats (Franklin and Marvin), a small flock of chickens and a school of fish.


Nicole L. Blithe, DVM

I’m Dr. Nicole Blithe. I attended Virginia Polytechnic Institute and State University (Virginia Tech) for my undergraduate studies.

I earned a bachelor of science in Animal and Poultry Science with an emphasis in Biotechnology.

After graduation, I worked at the National Heart, Lung and Blood Institute at the National Institutes of Health in Bethesda, MD as an intern for two years in a surgical lab.

I graduated from Virginia-Maryland Regional College of Veterinary Medicine at Virginia Tech and joined the Neffsville Veterinary Clinic Team in 2004.

My special interests include internal medicine, geriatric feline medicine, international travel, and ultrasound.

My husband, Scott, two children, Aiden & Avery, and I live in the southern end of the county with our cat Doc.

In my spare time, I enjoy boating, biking, riding our motorcycle, cooking, working on my house, shopping and watching Virginia Tech football. Go Hokies!!

Klint D. Hockenberry, DVM

Hi! My name is Dr. Klint Hockenberry. I joined Neffsville Veterinary Clinic in 2010.

I enjoy all aspects of veterinary medicine and surgery, with special interest in theriogenology (reproduction) and surgery (orthopedics and soft tissue). I was chosen from my graduating class to receive the “Excellence in Theriogenology” award. I offer ovulation timing, artificial insemination, semen evaluation, pregnancy diagnosis, cesarean section and neonatal care. Advanced surgeries are a major passion of mine; including ACL repair, anal sacculectomy, upper airway, and other advanced soft tissue surgeries.

I love the challenge and variety provided by being a veterinarian, as well as meeting members of the local community. I feel privileged to be able to develop lifelong relationships with pets and their people.

My outside interests include being a dad. When I’m not busy with that I enjoy exercise, fishing, jigsaw puzzles and word jumbles.

I live in Mount Joy with my wife and two sons, Grant and Gabriel. We have a crazy German Shorthair Pointer, Dreya.


Amanda J. Rouen, VMD

Hi, I’m Dr. Amanda Rouen and I joined the Neffsville Veterinary Clinic in 2007. I attended Pennsylvania State University where I studied in the Schreyer Honors College, and graduated with honors in Animal Bioscience.

I received my degree in veterinary medicine from The University of Pennsylvania in 2002. After practicing small animal medicine in Reading, PA for 5 years, I joined the Neffsville Veterinary Clinic in 2007.

I enjoy small animal medicine and surgery with a passion for feline medicine, dermatology, dentistry and senior wellness.

I have over 15 years of experience using a CO2 laser for surgical procedures. I attend annual meetings to stay current on medical, dental and surgical topics.
Outside of work I enjoy being with my family, cooking, reading and taking spin classes.

I live in Lancaster with my husband Seth and my children Evan and Ava. We have two orange cats named Pippa and Maybe, and a Cavalier King Charles Spaniel named Gatsby.

Maria E. Hillenbrand, DVM, MS

Hi, I’m Dr. Hillenbrand, and I joined the Neffsville Veterinary Clinic in 2018. I was born in Delaware but spent the majority of my childhood growing up in Texas and Virginia, before completing my high school career in Chester County, PA. I earned a Bachelor’s degree in General Biology with a concentration in Entrepreneurial Studies from Washington & Jefferson College. Two years later, I completed a Master’s degree in Infectious Diseases and Microbiology from the University of Pittsburgh. After working in research for a couple of years and producing multiple publications, I attended veterinary school at the University of Illinois and earned my doctoral degree. Following graduation, I practiced at a small animal hospital in York, PA.

I love general practice and have an avid interest in cardiology, oncology, and ophthalmology, as well as forming lasting relationships with clients and their pets. I enjoy attending veterinary conferences and hold memberships with the American Veterinary Medical Association and the Pennsylvania Veterinary Medical Association.

In my free time, I enjoy hiking, playing basketball, watching sporting events, traveling, spending time with family and friends and sharing my household with my rescue dog, Samson.

Jessica Grove, DVM

Hello all, I am Dr. Jessica Grove. I grew up in Windsor PA and began pursuing my dream of becoming a veterinarian at Millersville University, where I was awarded my Bachelor of Science. I continued my education and earned my DVM at Lincoln Memorial University – College of Veterinary Medicine.

I have a passion for all animals, small and large, and am blessed to be in a career where I have the opportunity to work with various species. I pride myself in building relationships with clients and I enjoy educating owners in any way I can. My special interests include surgery, dentistry, alternative medicine, and rehabilitation.

My husband and I live with our adorable French bulldog, Sophie. In my free time I enjoy gardening, crafting, riding four-wheelers, camping, and horseback riding.

Maya E. Lantz, DVM

Hi, I’m Dr. Maya Lantz. I graduated from York College of Pennsylvania with a B.S. in psychology in 2008. After a 5 year stint as a high school science teacher, I decided to pursue my true passion of working with animals while still being able to teach people. I attended St. George’s University with my clinical year at Virginia Tech, and graduated with my DVM in 2018.

While I enjoy all aspects of veterinary medicine, my greatest passion is educating owners from the basics of their pets needs, to how to best care for them during times of illness. When not at work, I enjoy spending time with my husband and two kids.

I also enjoy baking, crafting and enjoying outdoor activities like hiking.

Alexandra Riehl, DVM

Hello! My name is Dr. Alexandra Riehl. I was born and raised in Lancaster County. I completed my undergraduate studies at Penn State University with a B.S. in veterinary and biomedical sciences and minors in both wildlife/fisheries science and biology. I went on to attend veterinary school at the Tufts University Cummings School in North Grafton, Massachusetts where I graduated in 2020 as a Doctor of Veterinary Medicine.

Following graduation, I moved home to Lancaster to begin my career as a mixed small animal and exotic companion animal practitioner. My special interests include dentistry, avian/reptile/small mammal medicine and surgery, ultrasound, and the human-animal bond.

Outside of veterinary medicine, I play the drum set in a local rock band and enjoy reading, hiking, art, gardening, and spending time with the small “zoo” I share my home with, which now includes a basset hound, four cats, two ball pythons, a Florida kingsnake, a bearded dragon, a rabbit, a parakeet, a tarantula, and some fish.

Katherine Rosenbaum, DVM

Hello! I’m Dr. Katherine Rosenbaum and I joined the care team at Neffsville Veterinary Clinic in early 2021.

I am a native of central Pennsylvania and grew up in Johnstown, PA. I received my Bachelor’s of Science in Biology from the University of Pittsburgh at Johnstown in 2015. I attended The Ohio State University where I earned my Doctorate in Veterinary Medicine in 2019. Go Bucks! Shortly after graduating, I moved to York County where I started my veterinary career.

I have a strong passion for surgery and small animal preventative care, with an emphasis on underserved areas, such as behavioral medicine and nutrition. I am a sucker for spicy senior feline patients and goofy dogs, big and small.

I am humbled and honored to be a veterinarian and provide quality, compassionate care to your pets. I look forward to meeting you and your four-legged family members!

Outside of the clinic, I enjoy walking my cat Goose, spending time with family, camping, attending live sporting events, and visiting local attractions. My significant other and I reside in York County with our two cats, Duck Duck and Goose, and two Pomeranians, Macy and Maxwell.

Kaylee Moog, DVM

Hello! I am Dr. Kaylee Moog and I joined the Neffsville team as a veterinarian in June of 2021. I grew up in York County Pennsylvania and attended Wilson College for my undergraduate education. After I received my Bachelor of Science Degree and license as a veterinary technologist, I joined the team at NVC as an inpatient nurse in 2015. With encouragement and support from my family, friends, and Neffsville Veterinary Clinic, I decided to further my education and attended veterinary school at Mississippi State University.

I love all aspects of veterinary medicine but enjoy general practice the most! My special interests include dentistry, oncology, and feline medicine.

Outside of work, I enjoy horseback riding, hiking, and spending time with family and friends. I currently reside in York County with a large furry family which includes my senior dog (Lois) as well as five cats, five horses, and a green-cheeked conure named Zoey.

I look forward to meeting you and your furry companions!