Our Veterinarians

doctor stupine with black and white spaniel dog

Jeffrey Stupine, VMD

Medical Director & Veterinarian

Dr. Jeffrey Stupine graduated from George Washington University in 1999, earning a degree in Economics. After a successful career as an equity trader, he returned to school to pursue his true passion of Veterinary Medicine. He received his V.M.D in 2010 from the University of Pennsylvania School of Veterinary Medicine and has worked in both private practice and shelter medicine since. His veterinary interests include radiology, heart disease, and parvovirus. Dr. Stupine is currently the Medical Director for 3 World of Animals locations. When he’s not at work he enjoys spending time with his wife, daughter Lilly, and 1 year old Cavapoo Rosie.

doctor borland holding a small white dog

Tamara Borland, VMD

Veterinarian

Dr. Tamara Borland joined the World of Animals team in 2017. Her passion for veterinary medicine began at the early age of 12 volunteering for a local veterinary hospital. She earned her undergraduate degree at Boston College then went on to attend the University of Pennsylvania School of Veterinary Medicine where she earned her V.M.D. in 2007. After graduation, she headed west to the San Francisco bay area enhancing her knowledge and skills set. She feels honored to be a part of caring for pets and the humans they love, and focuses on delivering excellent patient care with understanding and compassion. Her special interests are dentistry, dermatology, and surgery. In her off time, she enjoys indulging her amateur foodie title exploring new restaurants, going on hikes with her dog Picxie, and feeding her love for music, art, and literature.

doctor radbill holding a small black and white dog

Steven Radbill, VMD

Veterinarian

Steven Radbill VMD is a graduate of the University of Pennsylvania School of Veterinary Medicine. Dr. Radbill is newly associated with World of Animals after successfully owning and operating Radbill Animal Hospital in Center City Philadelphia and in Northeast Philadelphia for over 40 years. Additionally, Dr. Radbill served on the Pennsylvania Board of Veterinary Medicine for 8 years. He is the author of the book Questions and Answers Dog Owners Ask Their Vet and was the Veterinary Contributor to Evening Magazine on ABC.

Dr. Radbill feels privileged to be part of the World of Animals team of Veterinarians and Staff who are dedicated to caring for our four-legged friends. His special interests are Laser Surgery, Dermatology, and Geriatric Medicine. In his spare time, Dr. Radbill enjoys biking, reading, gardening, and spending time with his family.

picture of woman holding cat for world of animals bensalem

LENA BULLOCK, DVM

Veterinarian

Dr. Lena Bullock joined our practice in July 2024 after earning her Doctor of Veterinary Medicine degree from Cornell University. Before pursuing her DVM, she completed her undergraduate studies at Penn State University. Dr. Bullock’s journey to becoming a veterinarian was driven by her lifelong love of science, animals, and people. She found that veterinary medicine combined all her passions, allowing her to make a positive impact in both her patients’ lives and her local community.
 
One of Dr. Bullock’s most rewarding experiences is seeing the transformation of pets suffering from allergies. Helping them recover and thrive brings her great satisfaction. She also enjoys working with puppies and kittens, adding joy to her day-to-day practice. Dr. Bullock believes that dental hygiene is essential for pets, often advising her clients on the importance of brushing their pets’ teeth.
 
Outside of her professional life, Dr. Bullock is a proud pet parent to two cats with unique names: Eggward Benedict and Rib Meat. In her free time, she enjoys painting her nails, collecting vinyl records, and practicing Pilates. Her favorite movie is Howl’s Moving Castle, and her favorite books is Pachinko. Musically, she’s a fan of both The Strokes and TVGirl.
animal hospital Philadelphia

Casey McMahon, VMD

Medical Director & Veterinarian

Dr. Casey McMahon earned a degree in Pathobiology at the University of Connecticut. She then attended the University of Pennsylvania where she received her Veterinary Medical Degree. After graduating she moved to Boston where she worked with dogs, cats, rabbits, guinea pigs and chickens. Dr. McMahon and her cat Bill are excited to be back in Philadelphia and be a part of the World of Animals family.

marissa burns holding two dogs and smiling for a photo

Marissa Burns, DVM

Veterinarian

Dr. Marissa Burns’ devotion to veterinary medicine began at the early age of 5 years. She took her passion of caring for her grandmother’s boxers and later started working in the field as an animal care attendant. She earned her undergraduate degree at Mansfield University in biology then went on to attend school at Iowa State University College of Veterinary Medicine where she earned her D.V.M. in 2014. She has since spent her time devoted to small animal wellness and emergency medicine. Her veterinary interests are surgery, dentistry, urgent care, and pocket pets. In her free time, she can be found with her husband, daughter, and two dogs Jaxon and Etta.

doctor laura tancredi holding a boxer puppy

Laura Tancredi, DVM

Veterinarian

Dr. Laura Tancredi attended veterinary school at Ross University School of Veterinary Medicine, on the Caribbean island of St. Kitts, and completed her clinical year at Purdue University. Her professional interests include diagnostic imaging, zoonotic disease and public health, and low stress handling.  Dr. Tancredi holds a Low Stress Handling® Silver Certification and is a Cat Friendly Certified Veterinary Professional®.

Dr. Cravens smiling and holding a small dog

Matthew Cravens, VMD

Veterinarian

Bio coming soon.

Dr. Lee posing with a puppy in front of the practice

Amber Lee, VMD

Veterinarian

Bio coming soon.

Dr. Margot Weissman smiling

Margot Weissman, DVM

Veterinarian

Dr. Margot Weissman was born and raised in Westchester County, New York. Growing up with a dog and an immense love for animals, it was clear that she would find a way to pursue her passion for caring for animals. Dr. Weissman graduated from the University of Michigan with a degree in International Relations and a focus in Public Health. After graduating with honors from University, she went on to enlist in the Israeli Defense Forces, serving in Oketz, the elite K9 unit of the Israeli army. She served as a dog trainer and caretaker for search and rescue dogs, attack dogs, and weapon-detecting dogs.

Following her service, Dr. Weissman received her degree in veterinary medicine at Cornell University with a focus in small animal medicine and surgery. During her degree, she spent a summer in Bolivia volunteering for a clinic responsible for the wellness of the local community’s dogs and cats. Throughout her time in undergraduate and graduate school, she participated in clinical and data research for cancer and endocrine diseases. After graduating from her degree in veterinary medicine, she completed a one-year internship in surgery and medicine with a unique focus in animal cruelty and shelter medicine at the ASPCA hospital in Manhattan and has since been practicing general practice medicine and surgery for household cats and dogs. Dr. Weissman believes in prioritizing patient and client care and comfort. When she is not at the hospital, she enjoys traveling, hiking, painting, and exploring fun areas in the city.

Brunette veterinarian Dr. Snyder holding brown and white dog

Marissa Snyder, DVM

Veterinarian

Dr. Marissa Snyder is originally from Connecticut and found her passion and love for animals early in life, always very involved with her family’s pets’ care. She earned a bachelor’s degree in Biology from the Georgia Institute of Technology, at the same time volunteering at local animal shelters and working at a local veterinary hospital as support staff. She then pursued her dream of becoming a veterinarian, graduating from the University of Pennsylvania and earning her VMD degree. After graduation she was back in Atlanta for a year long internship, continuing to hone her skills and knowledge at a specialty hospital with a focus in internal medicine, surgery, and emergency medicine.

Dr. Snyder is thrilled to be back in the Philadelphia area and to be a part of the incredible World of Animals team. She is dedicated to providing excellent and compassionate care to her patients and their families. In her free time she enjoys spending time with her boyfriend and their dog, Louie, being active whether it’s a bike ride or walk along a trail, and fueling her love for coffee and great food with all of the great spots Philly has to offer.

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