Animal Hospital at Thorndale, INC.

Joan M. Yarnall, 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.

Preparing a Post Pandemic Life for Pets

It may still seem like a return to normalcy will never get here. But with Covid-19 preventing vaccines soon becoming available, many households will soon shift gears. In our post pandemic world, adults will return to work. Children will go back to school. Dogs and cats accustomed to constant companionship will be left alone for …

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"What do you mean you are going back to work??" 3 golden retrievers anticipating post pandemic life

Curbside: What’s Taking So Long?

You scheduled your pet’s appointment a month ago. You arrive early and call into the hospital, following all the correct curbside protocols. The staff take your information. They tell you that someone will be out shortly to collect your pet. Then you wait. Finally, a masked person receives the hand off, and brings your pet …

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Spay and Neuter: When Is the Best Time?

At the onset of Covid 19, most veterinary hospitals delayed elective surgical procedures. We postponed many procedures, under orders of the Governor of Pennsylvania, so we could conserve personal protective equipment (PPE) for our human counterparts. This led to a lot of angst among pet owners. Many worried about having a young female pet go …

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Separation Anxiety in Pets

Chester County recently entered the “Yellow Phase” of Covid 19 recovery. For many of us, the ability to return to work or other activities outside of our home will be a welcome change. But how will our furry companions react to our departure? Many of us have been their constant companions for months. Some of …

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Picture of a girl holding a puppy representing the puppy pandemic splurge

Elective Procedures are Returning – But It Will Be Slow

Following the Pennsylvania State Board of Veterinary Medicine guidelines and following Governor Wolf’s direction, the Animal Clinic at Thorndale will begin offering elective procedures when they are officially sanctioned. Elective procedures include spay and neuter and annual examinations and vaccination updates. Our hospital will need to have sufficient surgical Personal Protective Equipment (PPE) to safely …

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We are slowly returning to routine puppy and kitten exams and elective procedures

Covid 19 – Can Cats Be Infected?

A few lions and tigers at the Bronx zoo began to show signs of Covid 19 infection after coming into contact with an asymptomatic zoo employee. Officials tested only one tiger because obtaining samples requires anesthesia for the large cats. The sick cats had dry coughs and loss of appetite. The World Health Organization (WHO) …

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Information on how Covid 19 may affect pets is changing daily