Medical Team

At Express Vets, our medical team of state-licensed veterinarians and staff are committed to practicing high-quality veterinary medicine.  Our team focuses on providing compassionate veterinary care for our patients and a welcoming, informative, and supportive environment for our clients. 


Dr. Stacy Hirst

Dr. Hirst is our full-time veterinarian at Express Vets. Dr. Hirst moved to Forsyth County from Cincinnati, Ohio in 1995 and is a local graduate of South Forsyth High School. She received both her undergraduate and doctorate degrees from the University of Georgia. Since graduating in 2006, she has been practicing small animal medicine locally and loves the connections she has made with her furry patients and their families. Dr. Hirst serves as the President of the Forsyth-Dawson Veterinary Medical Association. She and her husband, Graham, have two daughters, Emerson and Brantley, and their family also has two dogs, three cats, and salt water fish. In her spare time, she enjoys traveling, Georgia football games and spending time with her family and friends.

Dr. Dana Croy

Dr. Croy grew up in South Carolina and then attended vet school at the University of Georgia, graduating in 2000. She helps at a local shelter and enjoys both surgery and medicine. Her husband is a native of Cumming and they have a dog, two cats, honey bees, and chickens. In her free time, she enjoys spending time with her husband and daughter, gardening, hiking, college football, and fishing.

Dr. Kristen Chapman

Dr. Chapman graduated from Texas A&M University College of Veterinary Medicine in 2000. She practiced small animal emergency medicine in Dallas Texas for 5 years and then moved to Houston and spent 8 years at a small animal practice near NASA’s Johnson Space Center. In June 2013 she entered the pharmaceutical industry as a veterinarian with Novartis Animal Health and then Elanco Animal Health. In July 2016 she joined the Professional Services Veterinary team at IDEXX supporting the Southeast Region. In addition to her role to provide technical support to these areas, Dr. Chapman is a liaison with the veterinary school at the University of Georgia. She also volunteers for Canine Assistants – a fantastic service dog organization in Milton.

She fully embraces preventive care and client education with the knowledge that it is the key to long and healthy lives for furry family members.

Although a native of Texas, she loves Georgia’s beautiful outdoors and enjoys hiking, kayaking, nature photography and spending time with her husband, kids, dogs and cats.

Dr. Lyn Lewis

Dr. Thomas “Lyn” Lewis, Jr. is from coastal Beaufort, South Carolina. He attended Limestone College in Gaffney, S.C. for his Bachelor of Science in Biology, where he graduated with honors. In 1998, he began Veterinary School at the University of Georgia. In 2002, Dr. Lewis had the pleasure of presenting his grandfather, Dr. George Radford, his 50-year medallion honoring his graduation from UGA College of Veterinary Medicine in 1952. Soon after graduation in 2002, he started his career at Appalachian Animal Hospital in Ellijay, GA. He quickly became a partner and then purchased the hospital outright in 2008. In 2009 Dr. Lewis purchased Wayside Animal Hospital from Dr. Mike McGhee. By 2011, Dr. Lewis sold Appalachian Animal Hospital and focused his full energy into serving Pickens County and Wayside Animal Hospital. Dr. Lewis has extensive experience with both dogs and cats but has also worked with gorillas, kangaroos, raptors, cougars, black bear, and other wildlife. He loves internal medicine, dermatology, and has specialized training in physical therapy / rehabilitation. However, he especially loves spending time with our clients in both the exam rooms and the lobby. Dr. Lewis has authored over 100 articles for various newspapers in North Georgia. Dr. Lewis has always stayed active in the community with local Chamber of Commerce events, he works with local classrooms, the Youth Apprenticeship Program, and the FFA. He is the Founder and serves on the Board for the Mountain Emergency Animal Center, an after-hours veterinary hospital in Blue Ridge, GA. In his spare time, Dr. Lewis loves playing tennis, spending time with his wife Kristen and their children Addison and Patrick.

Marsha Wood

Marsha is a receptionist at Express Vets. She has been working in customer service in the veterinary field since 2006. Prior to joining veterinary medicine, she worked on the human medicine side in customer relations. Marsha has decided her heart is with the fur babies! Marsha is originally from West Virginia and later moved to Georgia in 1989 with her husband of 34 years. She enjoys spending time with her two children, one grandchild, and two dogs, Walker and Bella.

Lauren Williams

Lauren is a receptionist and veterinary assistant at Express Vets. Lauren has worked in veterinary field since 2013. Her love for animals started at young age, while she spent all her weekends, summers and holidays on her grandparent’s farm in Covington helping to take care of cows, pigs, chickens, roosters, bunny’s and beagles! She is a Native Georgian and has 2 young boys Malakai and Brexdyn. Lauren loves college football and bleeds orange and blue, Go Gators!! She also enjoys Braves baseball and Falcons football. In her spare time (which is rare) she likes to relax and her favorite thing to do is read, anything except horror! As long as she her morning cup of coffee, Netflix, Amazon prime and Target, she is a happy mama bear!

Ashley Gnagey

Ashley is a true animal lover!  She is a veterinary assistant at Express Vets and began her career in the veterinary field in 2012 with animal control.  Ashley owns horses, goats, lizards, and some awesome dogs!  In her free time she competes in dock diving and frisbee tournaments with some of her dogs. She has a unique passion for welding and working on her jeep with her husband.

Amy Hamby

Amy is a veterinary assistant at Express Vets. She is an original from Cherokee County, Georgia where she grew up with two older borthers and an older sister.  She moved to Pickens County in 2011 with her husband Jason and three children, Anthony, Michael, and Leslie.  She loves taking care of animals and working with people.  In her spare time, you will find Amy volunteering as an Assistant Coordinator with the local Toys for Tots or cheering for her hometown Dragons!  Her passion is life is to always help others.