Meet Our Doctors

Joan M. Yarnall

Joan M. Yarnall

B.S., B.S., M.S., V.M.D., Ph.D.

After completing a double undergraduate major (B.S. in Zoology and B.S. in Secondary Education) in 1974, and a Masters degree (M.S. in Physiology) in 1975, at the Pennsylvania State University, University Park, PA, Dr. Yarnall moved on to the University of Wisconsin-Madison, to complete a Ph.D. in Physiology in 1980. After a few years of post-doctoral research at the University of Texas Health Science Center, Houston, Texas , she decided to pursue her childhood dream of becoming a veterinarian. She began her veterinary education at Tufts University School of Veterinary Medicine, Boston, Massachusetts, and reestablished residency in Pennsylvania to complete her Veterinary Medical Doctor degree at the University of Pennsylvania School of Veterinary Medicine in 1987. After honing her skills as an associate veterinarian in another area practice for 6 years , she established the Animal Clinic at Thorndale in 1993. She designed our current facility at 431 Bondsville Road, Downingtown, relocating the practice there in 2004. Despite being a “gradual student” studying at various universities around the country, she now lives three miles away from where she was born and raised, and loves being a small animal veterinarian and practice owner. In addition to spending time with her pride and joy, daughter, Amy, and her pets, she enjoys gardening, wildlife, and many outdoor activities.

Nancy T. Haiko

Nancy T. Haiko

B.S., D.V.M.

Originally from the Lancaster area, Dr. Nancy Haiko completed her undergraduate degree (Animal Bioscience) at the Pennsylvania State University and then moved westward to earn her Doctor of Veterinary Medicine degree from Purdue University in 1997. She worked in another area practice for five years and also directed an animal blood bank before joining the Animal Clinic at Thorndale in 2002. She brought with her many talents and years of practical experience and has blended in well, both personally and professionally, with our hospital. Dr. Haiko enjoys spending time with her husband (John), son (Wes), daughters (Zoe and Caroline) and their many pets. The whole family enjoys outdoor activities such as hiking, biking, and running.

Hilary H. Fordyce

Hilary H. Fordyce

B.S., V.M.D.

Dr. Hilary Fordyce grew up in the small town of Carlisle, Massachusetts. She attended Kenyon College, where she obtained her undergraduate degree in biology and anthropology. She earned her Doctorate in Veterinary Medicine from the University of Pennsylvania, where she completed a small animal internship and post doctoral fellowship. Although she had a strong interest in surgery, she spent the next several years in emergency medicine. She joined the family here at the Animal Clinic at Thorndale in April 2013, where she continues to pursue her interest in surgery and medicine. When not working, Dr. Fordyce loves spending time with her daughter, Lucy. She enjoys running, gardening and competing with her horse, Sam, an off the track Thoroughbred. Rounding out her family are two cats, George and Smarty Jones, and a beautiful Rhodesian Ridgeback named Bella B.

Meet Our Staff

At the Animal Clinic at Thorndale, p.c., our professional staff members participate in all aspects of your pet’s care. Our staff is comprised of highly trained and qualified individuals who work as a team with the doctors to provide excellent care for our patients. Our board-certified veterinary technicians (C.V.T's) perform such duties as taking radiographs, wound care and bandaging, blood collections, and in-house laboratory testing. These specially licensed team members have completed a degree program, passed the certifying board examination, and attend yearly continuing education courses to maintain their licensing. Through additional training, several of our technicians have also earned a Veterinary Dental Technician certificate (V.D.T.).

Our veterinary assistants are trained by our technicians and doctors to assist as needed in the care of your pet and provide comfort for you and your pet during your visit to our hospital. Our friendly front desk staff is here to provide you and your pet with helpful and efficient service, answer your telephone calls, and assist you before, during and after your visit.

We are proud of all of our staff members. Everyone receives on-going in-house training and continuing education offered by professional veterinary organizations. Our entire staff is here to provide you and your pet with the most up-to-date service and professional, compassionate care.

Board Certified Veterinary Technicians


C.V.T., V.D.T., Head Technician


C.V.T., V.D.T

Meet Our Dog Family (Our cats prefer anonymity)


I can't believe my mom made me get off the couch for this.


Aka Mary Poppins because she is practically perfect in every way.


Not your average K9; a special soul that only his people can understand.


Handsome, sweet, favorite activity rolling in cow pies.


When you live with all dogs...think like a dog, live like a a dog...I am a dog!


Body of a Chihuahua, heart of a lion.


Little ball of fur with a HUGE personality!


Cute, ornery, and could possibly get away with murder if he wasn't afraid of his own shadow!!


One-eyed wonder, defies all odds. Kids' best friend!


One neuron, no synapses, but always happy.


Incredibly intelligent. Favorite past time: Shredding everything and anything when no one is looking.

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