Allied Veterinarian Emergency Hospital is also home to AVS.  Our AVS surgeons have extensive experience in all aspects of Veterinary Surgery.

 Dr. Brad Mackenzie DVM, DACVS-SA

  Dr. Mackenzie received his doctor in veterinary medicine from the University of Florida.  After graduation, he completed a general rotating internship at Medvet Medial and Cancer Center for Pets in Columbus, Ohio.  He then returned to Florida to complete a surgical internship at Affiliated Veterinary Specialists (AVS) of Orange Park and Jacksonville.  Thereafter, he was then selected into a three-year surgery residency program at Medvet.  

Upon completing of his surgery residency, Dr. Mackenzie became a staff surgeon at AVS Jacksonville.   He then joined the AVS specialty center in Orange Park and shortly thereafter became owner and chief of surgery.   

Dr. Mackenzie along with Dr. Aragon thereafter partnered with AVS Jacksonville unifying both veterinary specialty centers in the northeast Florida region.  Based on the high degree of client satisfaction and referral partner support, Drs. Mackenzie and Aragon opened a third and fourth specialty center – AVS of Gainesville, Florida and AVS of Daytona, Florida.  After several successful years of ownership and growth, Affiliated Veterinary Specialist partnered with BluePearl Veterinary Partners.  Dr. Mackenzie became chief of surgery and medical director of BluePearl, Jacksonville.

Currently, Dr. Mackenzie and Dr. Aragon are opening Allied Veterinary Specialists with three locations located in Tallahassee and Daytona, Florida and Brunswick, Georgia.

Dr. Mackenzie continues to be very active in the local veterinary community after serving as president of the Jacksonville Medical Society.  He works closely with many rescue groups and humane societies to give back to the community.  

When not performing surgery, Dr. Mackenzie enjoys spending time with his wife Rebecca who is also a veterinarian and their daughter Leighton, twin boys George and Alton and their dog Maggie.  When he has free time, he enjoys spending time outdoors playing golf and boating.


Dr. Carlos L. Aragon, DVM, DACVS-SA

After early acceptance into veterinary medical school at the age of 19, Dr. Aragon earned his Doctor of Veterinary Medicine degree from Colorado State University (CSU) in Fort Collins, Colorado.  While at CSU, he co-founded the first Student Association of Veterinary Surgeons and was elected Vice-President of his veterinary class.  

Dr. Aragon knew early on he wanted to pursue a career as a board-certified veterinary surgeon which requires several additional years of schooling so following graduation, he completed a general rotating internship in small animal medicine and surgery at the University of Georgia.  Thereafter, he completed a surgery internship at Affiliated Veterinary Specialists (AVS) and then a clinical instructorship at the University of Georgia where he taught surgery to veterinary students while performing research and publishing in peer-reviewed scientific journals (Veterinary Surgery Journal and the Journal of the American Veterinary Medical Association).  Dr. Aragon concluded his surgical training by completing a 3-year surgery residency at MedVet Medical and Cancer Center for Pets in Columbus, Ohio.  

His area of research interests and publications include cranial cruciate ligament (equivalent to the human ACL) surgery, wound management, cancer surgery, arthritis management and veterinary applications of evidence-based medicine.  Dr. Aragon is board-certified in veterinary surgery and his 13 years of education leading to this board-certification has provided him a special expertise in orthopedic surgery and fracture treatment, cancer surgery, abdominal surgery, spine and herniated disk surgery, minimally invasive surgery (arthroscopy and laparoscopy), thoracic surgery and wound management.  Dr. Aragon enjoys presenting at continuing education forums, which have included the regional veterinary conferences, the Veterinary Orthopedic Society annual meeting and the American College of Veterinary Surgeon annual symposium.  

Dr. Aragon partnered with Dr. Mackenzie in 2011 to unify AVS in the Jacksonville, Florida region and shortly thereafter expanded their clinics to a third and fourth location in Gainesville and Daytona Beach, Florida.  Six years later Affiliated Veterinary Specialists partnered with BluePearl Specialty and Emergency Pet Hospital where Dr. Aragon became chief of surgery and medical director of the Orange Park medical center.

In early 2021 and in part due to the pandemic, Dr. Aragon saw the emergent need of providing veterinary specialty care to our regional communities hence he made the decision, along with Dr. Mackenzie, to pursue his primary passion of building specialty hospitals and creating the best patient care teams who provide second-to-none pet care and client service.  

Allied Veterinary Specialists (AVS) was born based on this vision of inspiring one another to raise the standard of care for our animal family members.  In mid 2021, Allied Veterinary Specialty Clinics opened up three locations in Brunswick, Georgia and Tallahassee and Daytona Beach, Florida with the ultimate mission of empowering medicine and operations as a united team to provide the best care and patient experience for pets while harnessing an exemplary teamwork environment.


Vet Dog Collar — Veterinarian in Tallahassee, FL
  • Cancer surgery: Biopsy, tumor reduction or removal.
  • Cardiac Surgery: Heart surgery for birth defects.
  • Neurosurgery: Spinal surgery, disc repair, biopsy, trauma.
  • Orthopedic procedures: Knee repair (TPLO), fracture repair, MPL revision, fracture repair, limb deformity.
  • Soft tissue / Reconstructive: Thoracic & airway surgery, ear surgery (TECA, bulla or pinna repair), thyroid, parathyroid or adrenal surgery, advanced wound care, hepatobiliary, & urinary surgery.