Lanier Animal Hospital

5700 Cumming Highway Sugar Hill, GA 30518 - (770) 831-5965     Hours: Mon - Fri 7AM-6PM, Sat 8AM-Noon

Our Story

Lanier Animal Hospital was founded in June of 2002 and was originally located in a 1500 square foot strip mall close to Cumming, Buford, Sugar Hill and Suwanee. From the very beginning, our mantra has been to practice excellent medicine as well as to provide phenomenal service to our customers. Our focus on safety and cleanliness are unparalleled and helped drive our growth.

In 2012, Lanier Animal Hospital built a brand new 10,000 square foot facility across the street from its original location that is full of innovations that you will see nowhere else. We encourage you to come take a tour and see things for yourself - we truly are different from other animal hospitals.

Please take some time to browse our website to get familiar with us. Stop by for a tour and feel free to contact us with any questions that you might have.

We look forward to seeing you soon!



Dr. Mavis McCormick-Rantze - Veterinarian

Dr. McCormick-Rantze graduated in 2003 from the University of Georgia College of Veterinary Medicine. She also has undergraduate degrees in Animal Science and Zoology from the University of Georgia. Besides small animals, Dr McCormick-Rantze has a strong interest in avian and exotic animals. She lives in Cumming with her husband, two children, two dogs, three cats, and two saltwater fish tanks.


Dr. Sarah Keith - Veterinarian

Dr. Sarah Keith graduated from the University of Louisville with a degree in Biology. She then attended Auburn University's College of Veterinary Medicine where she graduated in 2003. She worked in the Alpharetta area for 9 years before moving to Lanier Animal Hospital to join Dr. McCormick-Rantze in 2012. Dr. Keith has a special interest in surgery and geriatric medicine but enjoys all aspects of small animal medicine. When she is not working she enjoys playing tennis, hiking and cooking. She lives with her 3 four legged children: Bacchus, Thulani, and Thabo.


Dr. Hannah Fearing - Veterinarian

Dr. Fearing graduated Summa Cum Laude from the University of Georgia College of Veterinary Medicine in 2016. She also has an undergraduate degree in Biology from Warren Wilson College. Dr. Fearing is especially interested in neurology and ophthalmology and particularly adores her feline patients. Outside of work, she enjoys riding her horse and running. She lives in Buford with her two cats.