Larklain Veterinary Services

5 Station Ave
Berwyn, PA 19073


Our Doctors



Clarissa B. Lyon, V.M.D.:


fear free certified

Clarissa B. Lyon, V.M.D.:

Dr. Lyon is a Philadelphia-area native, having grown up in Birchrunville, just west of the city.  She is a graduate of Hamilton College in snowy Clinton, NY and the University of Pennsylvania's School of Veterinary Medicine.  Her clinical interests include primary care small animal medicine, preventive healthcare, infectious disease and pain management.  

In addition to practicing companion animal medicine with a focus on preventive health care and owner education for over 15 years at various well-established practices in the area, she was a Field Service Veterinarian for the animal health company, Merial, serving as a resource on canine and feline infectious, including vector-borne, diseases to veterinarians and veterinary school faculty and students.  She is passionate about preventing illness and injury, improving quality of life and addressing acute and chronic pain for her patients.   She is equally passionate about client education.

She is a member of the American Veterinary Medical Association (AVMA), the International Veterinary Academy of Pain Management (IVAPM) and Phi Zeta Veterinary Medicine Honor Society.  She also belongs to the Delaware Valley Academy of Veterinary Medicine (DVAVM), a continuing education society. 

Dr. Lyon is a USDA Accredited Veterinarian (National Veterinary Accreditation Program) and as such, is certified to issue health certificates for interstate and international travel of companion animals.  

Her enthusiasm for discussing ideas and approaches to various Primary Care medicine topics has led her to be invited to speak at conferences such as the Penn Annual Conference (2017), on radio shows such as Your Pet Matters (periodically since 2015), Fear Free webinars for veterinary practitioners, and to be involved with local volunteer opportunities, e.g. Pennsylvania Veterinary Foundation's Share the Love event (a free veterinary care event for the pets of senior citizens in need in Chester County)

She is an Elite Fear Free Certified Practitioner.

When not traveling the countryside, attempting to stamp out disease and mitigate pain and suffering, she likes to play platform tennis, as well as hop on her bicycle, whenever possible. Until recently, she enjoyed spending time with her pasture potato, geriatric horse, Cody, and superstar, also geriatric, dog, Sukey (pictured), both of whom she just lost at the ages of 31 and 17, respectively. She still enjoys hanging out and playing pretty much any sport involving a stick or racquet and ball with her husband, Jeff, who is not geriatric, rescued or a pasture potato, but is a superstar.


Jeanne M. Dudas, V.M.D.: 

fear free certified

Jeanne M. Dudas, V.M.D.: 

Dr. Dudas hails from the great state of New Jersey with roots in New York City, but has called Chester County home for more than 20 years. She graduated from Loyola College in Baltimore, then went on to earn a Master’s degree in Large Animal Nutrition (she loves cows!) from the University of Delaware before graduating from the University of Pennsylvania’s School of Veterinary Medicine.  She has practiced in small animal comprehensive care hospitals for over 15 years.

She enjoys all aspects of companion animal medicine, including dermatology, internal medicine, diagnostic imaging, dentistry, nutrition, alternative therapy, and pain management.  She is trained in and offers Veterinary Orthopedic Manipulation (VOM) to her patients.  In addition, she has a special interest in and passion for ultrasonography, specifically abdominal imaging.

Dr. Dudas is a member of the American Veterinary Medical Association (AVMA), the Pennsylvania Veterinary Medical Association (PVMA), and the Delaware Valley Academy of Veterinary Medicine (DVAVM).

She is a Level 3 Fear Free Certified Practitioner.

She enjoys spending time with her children, Daniel and Kaitlyn, her husband Duane, and their accidental Doberman, Elsa. She recently earned her Black Belt in Tae Kwon Do and almost immediately retired from the sport in an attempt to preserve her middle-aged bones. In her free time, you can find her cheering for her son in soccer, her daughter in field hockey, for both kids in Tae Kwon Do, and finding any excuse for a day trip to make her way to the coast for a dose of salt air or fun at an amusement park.