Meet Our Veterinarians

Joan Poster, VMD

Dr. Poster founded Poster Animal Hospital in June of 1984, upon graduation from the University of Pennsylvania School of Veterinary Medicine. Before receiving her VMD, she earned an MS and PhD from City University of NY Medical School. She performed her post doctoral work at Mt Sinai Medical School as an assistant in the Dept. of Medicine. Dr. Poster is a licensed State of CT wildlife rehabilitator and has a USDA certification. She is a member of the International Veterinary Acupuncture Society and is an experienced acupuncturist. She is a member of AAHA, CVMA, IVAS, AVAA and the founder and advisor to Save Our Strays, Inc., a non profit small animal adoption group in Westport, CT. Dr. Poster is a member of CT SART and treats the K-9 Unit of Westport and Fairfield as a public service.

Raina Schunk, DVM, DABVP

Dr. Raina Schunk received her undergraduate degree in Animal Sciences as well as her veterinary education from Cornell University. In addition to her traditional veterinary degree, Dr. Schunk pursued additional training in the care of birds and exotic pets through a rigorous internship and two-year residency, and is board certified in avian practice.

Outside of work, Dr. Schunk enjoys spending time with her family, which includes husband Nick and daughter Zoey, cats Mango, Kiwi, and Gandalf, dog Harvey, and Quaker parrot Cilantro. Her hobbies include CrossFit and snowboarding.

Larry Berkwitt, DVM, DACVIM (SAIM)

Dr. Berkwitt received his veterinary degree from The Ohio State University in 1975, and then completed an internship and residency in small animal internal medicine at the same institution, in 1978. He became a board certified diplomate in The American College of Veterinary Internal Medicine after completing rigorous exams in both 1978 and 1980. He became the first internal medicine specialist in Connecticut and began a referral/emergency practice in New Britain and West Hartford. As he built his relationships with his colleagues throughout the state, the practice grew to include multiple specialties. He developed along with his associates a nationally recognized internship program from which many of its graduates have gone on to specialty training in multiple fields, and returned to Connecticut to practice. Almost all of the current specialty hospitals throughout the state have one of his graduates working there as either an emergency veterinarian or specialist. In 2017, he was awarded Connecticut Veterinarian of the Year in recognition of his leadership, contribution to teaching, and state of the art veterinary care. Currently he spends his professional time as Chief Medical Officer for PetVet Care Centers, which manages veterinary practices throughout the U.S. and Poster Animal Hospital where he sees patients on an appointment basis. Personally, he and his wife Jean enjoy traveling, New York Times crosswords, Ohio State Football and their children and grandchildren.