William J Carter graduated from Ohio State in June 1977 and came home to his father’s practice which was opened in 1947. William and his wife Michele worked, lived, and raised a family at Mercerville Animal Hospital before expanding the practice into the family home. William loves Mercerville Animal Hospital. He truly loves his profession – not sure if he loves it more than Disney. In his free time – he is calling Mercerville Animal Hospital, wanting to work more He also loves taking walks, being involved in the Mercer County community, vacations with family, and adores his kids and grandkids.

Danielle quite literally grew up in the practice—her earliest memories filled with the sounds of paws on the floor and the warmth of a community that treated every pet like family. Though her career began in a different world—spending over 20 years in hospitality, where she honed her skills in management, service, and leadership—her heart never left the clinic that shaped her.

Today, she brings that wealth of experience back to the family practice, blending a lifelong passion for animals with a deep commitment to care and excellence. With a unique perspective rooted in both veterinary legacy and customer service, she is proud to continue her family’s mission of compassionate, top-quality care. In her free time, she loves spending time with her family.

Colleen started her career with us in November of 1990 as an animal caretaker and kennel assistant while earning her bachelor’s degree through Delaware Valley College in Animal Science. Through the years she worked her way up to receptionist, then later to technician, and finally office manager. She worked side by side with William J Carter as her mentor. In July of 2006, she departed New Jersey as a single mother of two beautiful kids and went to Stillwater, Oklahoma. She worked in the Parasitology Department at Oklahoma State University while completing her residency and prerequisites for their veterinary program. Colleen graduated in 2012 from OSU with her Doctor of Veterinary Medicine Degree. She then moved to North Texas to practice, while staying close to her daughter and new granddaughter. Life and circumstances brought her back to us in April of 2015 where she joined our practice again, but this time as an associate veterinarian.

Colleen enjoys spending most of her free time with her three children, Kiersten, Devon, and Noah, her devoted husband, Ron, and her precious grandchildren, Lizzy, Bella, and Wyatt. She strives every day to learn and grow from her life experiences and above all “To Do No Harm.”

Dr Snelling started her career at Mecerville Animal Hospital in 1997 when she was in high school and continued working while attending Delaware Valley College. Jackie received her B.S. in Animal Science from Delaware Valley College.

In 2004, Dr. Snelling left Mercerville Animal Hospital to gain additional experience at Twin Rivers Animal Hospital, in East Windsor, NJ as a room and surgical technician. In 2005, she was accepted to St. George’s University in Grenada to study veterinary medicine, completing her clinical year at Louisiana State University and graduating with her Doctor of Veterinary Medicine in 2010.

Dr. Snelling worked at Banfield Pet Hospital for 11 years before coming back to Mercerville Animal Hospital In her spare time enjoys gardening, visiting different wineries, and spending time with her husband, Randy, and daughter Kathryn.

Amanda joined MAH almost 3 years ago as a receptionist. Shortly after starting, doctors and technicians saw her potential and promoted her to veterinary technician. Amanda has always had a love for all kinds of animals: dogs, cats, ferrets, hamsters, birds, and lizards. Ever since she was a baby her dad has worked at the animal shelter and she has always been around animals and loved caring for them. She has a Shepherd mix fur baby, Sandy, who was rescued as a puppy. Amanda looks forward to continuing her education in this field and hopes to become a certified veterinary surgeon technician.

Liz has loved animals her entire life (having been raised by a Siamese cat helped influence this worldview). She began working at Mercerville Animal Hospital in 2012 and earned her Veterinary Technician Certification at Camden College. Liz loves all animals but especially adores cats; she currently shares her life with a beautiful long-haired tortie-tabby named Pumpkinhead.

Jen joined the MAH team in May 2013 as a kennel attendant, she quickly worked her way up to receptionist and then found her passion in her current position as a veterinary technician. In her free time she enjoys spending time with family. Jen has a love for all animals but it’s no secret she has a soft spot for German Shepherds and Belgian Mallinos. Jen has a Belgian Mallinos named Sam and a cat named Griswald!

Ronin began shadowing during appointments and surgeries in 2019 after taking his bud Murphy for frequent appointments. Joining the staff in 2020 doing reception he then moved to kennels and taking care of the cats in the cat cottage, nicknaming his favorites. Currently he is working towards veterinary technician and plans to continue with education in the veterinary field. In his free time, Ronin enjoys taking Murphy for walks, running, gardening, and brewing beer/kombucha. He overall loves all animals more than most things and is excited to spend time with them.

Judy is a dedicated veterinary receptionist with a deep love for animals, especially cats. Her warm personality and attention to detail help create a welcoming environment for both pets and their owners. When she’s not helping furry patients, she’s probably curled up with her cats, a good movie, or listening to a great playlist.

With over a decade of dedicated experience, Dori is a passionate veterinary technician committed to providing exceptional care for animals. Their 10+ years in the profession have honed their expertise in various aspects of veterinary medicine, from assisting in critical procedures to ensuring patient comfort. At home, Dori’s commitment to animals continues with their cherished dog, Kayla.

Passionate about animal care and committed to supporting veterinary teams, Jasmine is a dedicated veterinary technician with a love for all things furry, feathered, and green. When not at the clinic, you’ll likely find them hiking scenic trails, tending to their ever-growing plant collection, diving into a good book, or leveling up in their favorite video games. Their diverse interests fuel a balanced life rooted in compassion, curiosity, and a deep respect for nature.

Michele is a veterinary receptionist with a passion for animals and helping people care for their furry family members. When she’s not at the hospital, she’s spending quality time with her two amazing kids. She’s compassionate, always ready with a smile and here to make every visit a little easier for both pets and their people.

Samantha is a compassionate veterinary receptionist who has a special place in her heart for all animals— including the beloved house cat Stuart Little. Her love for animals shines through in every interaction. When she’s not at work, Samantha enjoys creating art and exploring the outdoors, where she finds both joy and inspiration with her pets and family.

Karin Sienkiewicz, CVT, Joined our team in April 2015 Bringing with her many years of experience in the veterinary field. She received her degree Through Camden County College. She spends her free time with her husband Jeff and two Dobermans Anya and Rucca. Her favorite past time activities are gardening, hiking, and outdoor activities with her dogs.