The Doctors

Andrew C. Sloyer, DVM

Hello, I am Dr. Andrew Sloyer. After graduating from Franklin and Marshall 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 terrier (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 veterinary travel certification, and ultrasound.

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

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 2 German Shorthair Pointers (Dreya & Jelly), a lab (Chubbles), and a cat (Meep).


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 a special love for Cavalier King Charles Spaniels.

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.


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 four cats, Duck Duck, Goose, Pigeon, and Robin and a Pomeranian, Macy.


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, four horses, and a green-cheeked conure named Zoey.

I look forward to meeting you and your furry companions!


Heather Reist, DVM

Hello! My name is Heather Reist and I am a Lancaster County native! While completing my Bachelor’s of Science at the University of Findlay in Northwestern Ohio, I worked at Neffsville Vet Clinic in the Pet Resort. I continued my education at Lincoln Memorial University in Tennessee to complete my Doctorate of Veterinary Medicine. It is an honor to be invited back to Neffsville after completing my DVM degree to work with such amazing doctors and staff!

Some special interests of mine in veterinary medicine include soft tissue surgery, dermatology, feline medicine, and ultrasonography. I am especially passionate about sharing my knowledge with clients in a way they can understand.

At home, I have a variety of animals that keep me busy! They include an English cream golden retriever named Marina Bean, an orange cat named Leroy Brown, a senior black cat named Baby Cat, a small herd of Angus cattle, and a Gyspy Vanner horse named Calypso. I have a soft spot for orange cats and golden retrievers!

In my free time, you may find me gardening, attending antique auctions, working cattle, going on hikes with my dog, trying out local coffee shops, learning about Lancaster County history, or volunteering at Highland Presbyterian Church.


Jennifer Mulvaney, DVM

Hello! My name is Jen Mulvaney and I joined the Neffsville team as a veterinarian in February of 2023. I am originally from Morris county, NJ but have been living in Pennsylvania for the last 5 years. I attended the University of Delaware and graduated with a Bachelor’s of Science in pre-veterinary medicine and animal biosciences. I then attended veterinary school at Ross University on the Caribbean island of St. Kitts for my didactic learning and University of Tennessee in Knoxville, TN for my clinical year. I graduated in January of 2023 as a Doctor of Veterinary Medicine. My husband grew up in Lancaster, which is what drew us back to the area and led me to Neffsville!

I enjoy all parts of veterinary medicine but fell in love with general practice! I enjoy making lifelong relationships with pets and their owners! I have a special interest in soft tissue surgery, dermatology and preventative medicine as a whole. I am so excited to be part of this team and can’t wait to meet you and your pets!

Outside of the clinic, I enjoy gardening, hiking with my dogs, cooking with my husband and relaxing on the couch with a good book. I currently live in Lancaster county with my husband and 3 dogs, Ryder, Lily and Kona.


Danielle K. Lanz, DVM

Hello! I am Dr. Danielle Lanz and I am happy to have joined the Neffsville team in 2023. I am originally from Lancaster and am excited to be back and to be able to practice in my home county. In pursuit of a career in Veterinary Medicine, I attended West Chester University where I received my Bachelor’s in Integrative Biology. I then attended Lincoln Memorial University, in TN where I achieved my doctorate in Veterinary Medicine. I have a passion for small animal medicine with a special interest in ultrasonography, theriogenology (reproduction) and soft tissue surgery. One of my favorite things about veterinary medicine is helping to preserve and nurture the bond that humans and animals share. In my spare time, I can be found on various adventures with my two golden retrievers, Cassie and Lailah. Our favorite adventures typically include hiking and water sports, especially paddle boarding.