631-732-0900 | 644 Middle Country Road, Suite D, Selden, NY 11784

Veterinarian Office in Selden, New York

About Our Staff


Dr. Evan Clark

Dr. Clark was born and raised on Long Island. He attended Cornell University and received his BS with honors in 1980. He graduated from the NYS College of Veterinary Medicine at Cornell University as a member of the national veterinary honor society in 1983. After a year in farm animal practice in Amish country in Pennsylvania Dr. Clark returned to Long Island and married his veterinary school sweetheart. In 1988 he opened the Middle Country Animal Hospital with Dr. Cavallo. He has been married to his lovely wife Pat for 30 years and has two grown children. Dr. Clark enjoys tennis, biking and running with his Brittany Spaniels. He and his wife have completed four marathons and over 20 half marathons since 2006.
Dr. Clark - Animal Hospital, Veterinary Services in Selden, NY

Dr. Kerrie Moll Cavallo

Dr. Kerrie Moll Cavallo's interest in becoming a veterinarian was evident in early childhood, where her preferred play involved a toy doctor kit and plush animal patients! She is Long Island born and raised, graduating from Harborfields High School in 1973. After two years at SUNY/Albany, she transferred to SUNY/Stony Brook, graduating in 1977. Dr. Cavallo's girlhood dream was realized upon graduation from the NYS College of Veterinary Medicine at Cornell University in 1982.
After completion of her education, Dr. Cavallo acquired valuable experience working for several years at a pet hospital in Huntington, and another in Brooklyn. Life and a new family eventually brought her back to Long Island, and in 1988 she and Dr. Clark opened Middle Country Animal Hospital, where they have been practicing happily ever after!
On 'off duty' days from our hospital, Dr. Cavallo provides services to the Guide Dog Foundation For the Blind/ America's Vet Dogs in Smithtown, working as their senior staff veterinarian. For fun, Dr. Cavallo enjoys many outdoor activities - running, biking, kayaking, skiing, tennis, and sailing, two grown children, and spoiling two standard poodles, Isabella and Misty, adopted after their release from the Guide Dog Foundation training program.
Dr. Cavallo - Animal Hospital, Veterinary Services in Selden, NY



Is our head Receptionist. she has been greeting our clients with her sweet, smiling face and warm friendly voice since 2007. She has wanted to work with animals since kindergarten, attending Sachem North High School and participating in the Boces Animal Science Program. She graduated with honors in 2006, and went on to earn her associates degree at Suffolk Community College in 2009. She adores lions and tigers, and dreams of working in a big cat nursery. In the meantime, she enjoys greeting our patients and their families. So far she has rescued and adopted her own menagerie....an abandoned waif named Kitty, a retriever mix named Roxie, a hound mix named Bella and finally Waffles, a Pomeranian with attitude!
Kristen- Animal Hospital, Veterinary Services in Selden, NY


Has been a beloved member of the Middle Country Animal Hospital family for five years, and is affectionately dubbed the 'Mother Hen', as she nurtures and encourages the younger members of our staff. She came to us with many years of experience working in animal hospitals and pet grooming establishments, and when not attending to our furry patients, she is busy raising two sons, Steven and Tyler, named - with her husband's blessing!! In honor of her favorite rock star!! She currently owned by four dogs- Mishka, a long haired Chihuahua, Shyna, a Pekingese / Chihuahua mix, and LingLing and Squeek, both Japanese Chins.
Carol - Animal Hospital, Veterinary Services in Selden, NY


Came to us five years ago after working at the Guide Dog Foundation for the Blind. She has a huge passion for animals (her own words), and when not ably restraining and assisting with our fuzzy patients, enjoys grooming , and raising her five Canine children- a labradoodle retired from the Guide Dog Foundation, a new addition Journey who is a Golden-Doodle,and my super model old lady who I call B and two Morkies she calls the Meatball twins. She one day aspires to be a Canine Police officer.
Jocelyn - Animal Hospital, Veterinary Services in Selden, NY


One of our newest team members, joined us in 2013. Kerilyn graduated Suffolk Community College in the Veterinary Technology Program and is now a licensed veterinary technician. She has always loved animals and has three dogs - Lola, Bella and Brook, three cats - GracieMay, Nugget and Samantha, three very cute and friendly birds- Bean, Jackson and Pumpkin and the guinea pig named Flower.
Kerrielyn - Animal Hospital, Veterinary Services in Selden, NY