About Greenfield Vet

Greenfield Veterinary Hospital is proud to have served the Pittsburgh area since 1979. We are a well-established, full-service, small animal veterinary hospital providing comprehensive medical, surgical and dental care. We provide a broad spectrum of diagnostic procedures through in-house testing and the use of external laboratories. We also work closely with local specialists when special diagnostic procedures or treatments are required.

Our team is committed to providing the highest level of medicine along with friendly, compassionate service. We are a group of highly trained, experienced animal lovers who are devoted to giving our patients the best care possible. Our job is to not only treat your pet when he or she isn't feeling well, but to also help you keep your pet happy and healthy.

*We currently treat dogs and cats. We are not accepting new avian, ferret, rabbit or pocket pet patients at this time.

Our Team

Sean Winnie


Dr. Winnie is a graduate of the University of Minnesota and has been practicing veterinary medicine for over 20 years. He is the medical director and owner of Greenfield Veterinary Hospital. He has two children, Asher and Vast, two step children, Courtney and Cayla, two grandkids, William and Dakota, and enjoys hockey and playing Dungeons and Dragons during his off time. He is lovingly owned by three Sphynxes named Sid, Zafiro and Ace.


Practice Manager

Carey is a graduate of Chatham University (BA, MBA). She began her career with animals working at the Animal Rescue League (now HARP) in 2002. Carey was with GVH from 2005-2012 as a part-time receptionist and came back in 2015 as the practice manager. She has two long-haired rescue cats named Angel and Maggie and a derpy rescue Doberman named Harley. Carey loves to get to know the pets that visit the office every day. In her spare time, she enjoys creating glass mosaics, trying her hand at stained glass and learning the cello.

Make Appointment

We will do our best to accommodate your schedule. Request an appointment today!

Our Services

We strive to provide comprehensive care for our patients. 

New Patient Center

We have online forms for everything related to our Austin veterinarian clinic, and information.