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Dr Wayne Sullivan is a native of Nashville, TN. He attended UT Martin for his undergraduate studies, and received his DVM degree from the University of Tennessee College of Veterinary Medicine in 1984. After two years in private practice and emergency practice in Virginia Beach, VA, Dr Sullivan returned to the Nashville area. In Nashville he held associate positions at Denny Animal Hospital and Belle Forest Animal Hospital, before opening Animal Care Center of Brentwood with Dr O'Neill in 1991. Dr Sullivan's areas of special interest include surgery and orthopedics. In his spare time, Dr Sullivan is active in the Knights of Columbus Council 12012 at St Henry Church.

Dr Lisa O'Neill is originally from Atlanta, GA. She attended the University of Georgia and UT Knoxville for her undergraduate studies, and received her DVM in 1984 from the University of Tennessee College of Veterinary Medicine. Dr O'Neill began private practice in Portsmouth, VA. In the Nashville area she held associate positions at West Meade Veterinary Clinic and Belle Forest Animal Hospital before opening Animal Care Center of Brentwood with Dr Sullivan in 1991. In 1991 Dr O'Neill attained specialty certification from the American Board of Veterinary Practitioners (ABVP) in Canine and Feline Medicine. Currently there are 24 veterinarians in the state of Tennessee who hold ABVP certification. The ABVP is the only veterinary specialty that requires re-certification every 10 years. Dr O'Neill successfully re-certified for 2001-2011. Due to the demands of family life, she elected not to pursue re-certification for a third term. Dr O'Neill is very grateful for the knowledge and experience that ABVP membership has added to her practice. Dr O'Neill's special interests are behavior and feline medicine. In her spare time she enjoys running, and completed her first Ragnar Relay in October 2013. She also enjoys her association with Nerium International as an independent distributor.