Sara Brethel, DVM

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Sara Brethel, DVM
Sara Brethel, DVM

Board Certified in Cardiology by the American College of Veterinary Internal Medicine

Dr. Sara Brethel grew up in a family with a love for animals in New York. Throughout her undergraduate studies, she was involved with wildlife rehabilitation and enjoys working with exotic patients. After graduating from veterinary medicine, she completed a small animal medicine and surgery internship, a cardiology specialty internship and her cardiology residency.

As a cardiologist, she loves working with pets and their owners to find the best plan to suit their needs and goals. She is dedicated to making the visit as much of a positive experience as possible and compassionately relates to situations to help put pet owners at ease with treatment plans.

In her spare time, Dr. Brethel enjoys hiking, kayaking, traveling, visiting breweries with friends and trying out new restaurants. She also loves to cook and bake.


  • Bachelor of Science in Zoology, State University of New York at Oswego
  • Doctor of Veterinary Medicine, St. George’s University School of Veterinary Medicine
  • Small Animal Medicine and Surgery Rotating Internship, Veterinary Emergency and Referral Group, Brooklyn, NY
  • Cardiology Specialty Internship, Veterinary Emergency and Referral Group, Brooklyn, NY
  • Cardiology Resident, University of Florida College of Veterinary Medicine
  • Diplomate, American College of Veterinary Internal Medicine (Cardiology)


Husband Greg, who is also a veterinarian.


Cinder and Daredevil (DD) both domestic shorthairs and Maisy an energetic schnauzer mix

Recent Blog Posts from Dr. Brethel

When Your Puppy Has a Heart Murmur, What Do You Do?

Hearing that your new puppy has something wrong with its heart can be frightening and confusing news. Does this mean your dog’s not going to have a long life? How do you care for a congenital heart problem? How do you know when to go beyond your regular veterinarian...

Heart Disease in Cats: It’s Difficult to Diagnose but Often Treatable

Heart disease in cats can be an elusive topic. Our feline friends are more secretive in nature when compared to our canine counterparts. The clinical signs they display can often go unnoticed and sometimes can be vague. Vomiting or increased hiding behavior often are...

Heartworm Can Kill – But It Doesn’t Have To

More than 200 types of mosquitoes live in the United States, and a dozen spread germs that make us sick. West Nile, dengue, malaria and Zika viruses get lots of attention when they strike people. But the most common mosquito-borne disease in America attacks our pets....