Our Veterinarians

TX Vets

The Great Oaks Animal Hospital team of skilled veterinarians welcomes you to our practice. Proudly serving the Round Rock and Cat Hollow areas. At Great Oaks Animal Hospital, it is our daily privilege to provide quality vet care to your cherished pet, with compassion and competence. We hope to ensure a positive impact on our patients, pet owners and the local community.


Dr. Lisa J. Willis

Dr. Willis, the Chief of Staff of GOAH, graduated from Texas A&M University College of Veterinary Medicine in 1996. She started working at Great Oaks as Dr. Ransom’s technician in 1992. After completing her degree she became a full time associate veterinarian and then took over the roll of Chief of Staff after Dr. Ransom’s passing in 2005. She and her husband Mike, have three human children Patrick, Darcie and Gillian. She has two canine children Cali and Ferb  one feline  Squish, her horse Roy the retired Thoroughbred, some goats and crazy chickens. When not at the hospital, she enjoys playing soccer taking care of her small farm and volunteering at her children’s schools.
Dr. Willis is a member of the AVMA.


Dr. Laura Beth Baugh

Dr. Baugh is a graduate of Texas A&M University. She received her Bachelor of Science degree in 1993 and her degree in Veterinary Medicine in 1998. She has been employed at Great Oaks Animal Hospital since May of 2002. Her primary professional interests include internal medicine and geriatrics. Dr. Baugh shares her home with her greyhound Katie, and her boston terrier Jack. She also has two rabbits Lily and Snaggle, and a cockatiel named (aptly) Bird Bird. When not at work, you will most likely find her crossfitting, running , or cooking.
Dr. Baugh is a member of the AVMA.


Dr. Kelli Kristine Grimm

Dr. Grimm is an almost native Austinite. Her undergraduate degree is from Texas A&M University at Galveston and she did her masters work at the Shedd  Aquarium in Chicago. She graduated from Texas A&M College of Veterinary Medicine in 2002 and completed an internship in small animal medicine and surgery at the University of Missouri in 2003. She joined Great Oaks Animal Hospital in 2005. Her areas of interest include feline medicine, oncology and geriatrics. She has four rescued cats Calliope, Cinder, Bella and Aslan and mouse named Harriet. In her spare time, she sings at River bend Church and volunteers with the Junior League of Austin. She also enjoys being with her family, cooking and being outdoors.
Dr. Grimm is a member of the AVMA and the Texas Veterinary Medical Association, where she serves as a member of the Companion Animal Medicine Committee. She is also a member of the American Association of Feline Practitioners where she serves as a Regional Director/student liason.


Rebecca McClannahan, D.V.M.

Dr. McClannahan was born in Texas in a military hospital and spent the next several years moving with her family. She eventually settled in San Antonio and attended Texas A&M University. She graduated with her Bachelors of Science in 1998 and the College of Veterinary Medicine in 2002.
After graduation, she started her veterinary career in the Dallas areas and eventually moved to  Austin in 2009 with her boyfriend Glen. In 2010 she began with Great Oaks Animal Hospital as a relief veterinarian and became a part time associated in 2012. She enjoys getting to work with the staff at Great Oaks Animal Hospital including her former classmate Dr. Grimm. She lives with fellow Aggie Glen, two dogs Zack and Scooby, a cat Vern and an inherited gourami named Clarence. In her spare time, she can be found on Lake Travis on a sailboat with Glen, enjoys many forms of science fiction, and exploring Austin’s vast unique food offerings.
Dr. McClannahan is a member of the AVMA and Texas Veterinary Medical Association.

Dr. Real Ransom - In Memoriam

Dr. Real Ransom graduated from Texas A&M University College of Veterinary Medicine in 1989. He opened Great Oaks Animal Hospital at its original location in 1990. He and his wife, Cindy, were tragically killed in a private plane crash in September 2005. He remains a special part of Great Oaks Animal Hospital.