Dr. Frank Kostolitz attended the University of Parma in Italy where he received his  DVM. He started practicing veterinary medicine in Middletown in 1984, providing  care to both small and large animal medicine and surgery, and in 1990 he  established Yalesville Veterinary Hospital in Wallingford, CT.

Dr. Lisa Saravis is proud to have been a full time member of Yalesville Veterinary Hospital since 2005. A Connecticut native, she obtained her Bachelor's degree in Biochemistry, graduating cum laude from Connecticut College.

Dr. Robert Hallock is a 1969 graduate of the University of Pennsylvania School of Veterinary Medicine. He was the owner of Meriden-Wallingford Veterinary Associates from 1971 until 2014 when both hospitals merged. 

Dr. Catherine Donewald grew up in Wallingford, CT and is very excited to be back 'home' at Yalesville Vet. Prior to and during college she worked at Yalesville Veterinary Hospital, starting in 2006, in a variety of positions including Veterinary Technician.

Dr. Resa McLellan is a native of the Naugatuck Valley and is fulfilling her lifelong dream of serving as a veterinarian. She received a Bachelor of Arts degree in Biological Sciences with a cell and molecular concentration from Connecticut College. She then attended the University of Pennsylvania School of Veterinary Medicine, where she obtained her VMD degree.

Dr. Molly Chirunomula grew up in Connecticut, where she spent her childhood dreaming of joining the veterinary profession! She received her Bachelor's degree in Biology from Tufts University. She completed her veterinary education at Cornell University.

Dr. Jill O'Callaghan is a Connecticut native. She grew up in New Canaan, CT and graduated from Wake Forest University in North Carolina with a degree in Biology in 1997.

Dr. Marjorie O'Neill grew up in Wallingford, CT. She obtained her B.S. from Quinnipiac College in 1979 and subsequently accepted a position at Wake Forest University.