About Us
If you’re here, there’s a good chance you’re concerned about your pet. Maybe something’s changed – fainting, coughing, slowing down – or maybe your primary vet has mentioned a possible heart issue. It’s a confusing moment, and it’s normal to feel uncertain about what comes next.
At Sawgrass Veterinary Cardiology, we understand how high the stakes feel. You’re not just seeking a diagnosis, you’re also making decisions about your pet’s quality of life; and placing your trust in a team to guide you through it. That trust means everything to us.
Our team brings deep experience, advanced training, and a genuine commitment to care. Every pet we see is evaluated in person by a specialist. Every treatment plan is tailored to your pet’s specific condition, your goals, and what’s realistic for your family.
We don’t believe in rushed answers or one-size-fits-all solutions. We take the time to explain, to listen, and to walk with you—step by step—so you feel informed, supported, and confident in every decision.
Sawgrass Veterinary Cardiology offers an ACVIM-approved residency program as well as a cardiology specialty internship program designed to cultivate the next generation of board-certified veterinary cardiologists. Our trainees gain hands-on experience with a diverse caseload, state-of-the-art imaging and interventional technologies, and direct mentorship from experienced ACVIM diplomates. The program emphasizes evidence-based medicine, procedural excellence, and critical thinking – preparing clinicians for both clinical practice and academic leadership in veterinary cardiology.
Meet The Team
Dr. Dewey Carpenter
DVM, DACVIM (Cardiology)
Founder & Board-Certified Veterinary Cardiologist
When it comes to your pet’s heart, you want answers you can trust, and a specialist who truly cares. That’s exactly what led Dr. Dewey Carpenter to create Sawgrass Veterinary Cardiology.
After serving six years in the U.S. Navy, Dr. Carpenter began his veterinary journey with a dual degree in Biology and Chemistry at Charleston Southern University in 1996. He then earned his Doctor of Veterinary Medicine from Mississippi State University in 2000. He completed advanced training in small animal medicine at Auburn University, followed by a residency in Comparative Cardiology at the University of Minnesota. In 2005, he became a board-certified cardiologist through the American College of Veterinary Internal Medicine.
Dr. Carpenter’s real focus has always been on the people and pets behind the diagnosis. In 2016, after more than a decade as the sole cardiologist at Coral Springs Animal Hospital, he founded Sawgrass to expand access to specialized cardiac care across Florida – with an emphasis on clarity, compassion, and collaborative care.
Known for his calm approach, clear communication, and unwavering commitment to patient wellbeing, Dr. Carpenter partners closely with families and referring vets to deliver care that’s both medically advanced and deeply personal.
Outside of work, he enjoys time with his wife of over 30 years, their three children, two cats, and three dogs. He also keeps active with scuba diving and training in Northern Seven Star Praying Mantis Kung Fu.
Dr. John Hertzer
DVM, DACVIM (Cardiology)
Board Certified Cardiologist
When a pet is facing a heart condition, Dr. John Hertzer is passionate about helping families understand what’s happening and what they can do about it.
Originally from Pittsburgh, Dr. Hertzer completed his undergraduate studies at the University of South Florida before earning his Doctor of Veterinary Medicine from the University of Florida in 2020, where he graduated Summa Cum Laude. During vet school, he served as Vice President of the student chapter of the American College of Veterinary Internal Medicine (ACVIM) and began contributing to cardiology research, including a published abstract on the use of intravenous pimobendan.
He completed a rotating internship at Texas A&M College of Veterinary Medicine, where he co-authored multiple publications—including work on how body positioning affects EKG readings when using a Kardia mobile device. He then joined Sawgrass Veterinary Cardiology where he completed a one year specialty internship and a three-year residency under the mentorship of Dr. Dewey Carpenter. He achieved board certification with the ACVIM in 2025 at the completion of his residency.
Dr. Hertzer brings curiosity, compassion, and a deep respect for client education to every case. He believes that helping pet owners understand their pet’s condition is just as important as making the diagnosis itself.
Outside of the clinic, you’ll find him on the water, at the grill, or watching Gators and Steelers football with friends and family.
Dr. Jenny Applebaum
DVM
Cardiology Resident
Dr. Jenny Applebaum grew up in Coral Springs, Florida, and earned her undergraduate degree in Biological Sciences from Florida Atlantic University. She went on to receive her Doctor of Veterinary Medicine from the University of Illinois College of Veterinary Medicine in 2023. Following graduation, she completed a small animal rotating internship at Texas A&M University before pursuing a cardiology specialty internship at BluePearl Pet Hospital in Irvine, California. She is currently completing her cardiology specialty internship at Sawgrass Veterinary Cardiology, with plans to continue her training to become a board-certified veterinary cardiologist.
Throughout her academic and clinical journey, Dr. Applebaum has remained actively engaged in veterinary research. She has presented abstracts at both the National Veterinary Scholars Symposium and the American College of Veterinary Internal Medicine (ACVIM) Forum. Her research interests include evaluating digital stethoscope technology for improved murmur detection and exploring CT-based measurements to optimize tracheal stent sizing, among other areas that advance the field of veterinary cardiology.
Beyond her clinical and research accomplishments, Dr. Applebaum is deeply passionate about client communication and strengthening the human–animal bond. She believes that empathy, education, and collaboration are essential to providing comprehensive and compassionate care for every patient and family.
Outside of veterinary medicine, Jenny enjoys spending time outdoors, whether relaxing at the beach in Florida or hiking in the mountains up north. She also loves traveling, spending time with her family, and being with her two beloved cats.
Dr. Sydney Boo
DVM
Cardiology Intern
Dr. Boo graduated cum laude from the University of Maryland with a Bachelor of Science in Animal Science. He went on to earn his Doctor of Veterinary Medicine (DVM) from the Virginia–Maryland College of Veterinary Medicine. He is currently completing a rotating internship at Friendship Hospital for Animals in Washington, D.C., where he has had the privilege of working alongside and learning from an exceptional team of veterinarians.
Having spent his entire life in the DMV, Dr. Boo is excited to begin the next chapter of his career with Sawgrass Veterinary Cardiology in Florida. He has a strong passion for cardiac emergencies and is committed to supporting patients and their families through some of their most stressful and emotional moments. His long‑term goal is to become a recognized leader within the veterinary community through meaningful contributions to the field of veterinary cardiology.
Outside of work, Dr. Boo enjoys life with his chocolate Labrador, Costa, whom he rescued during veterinary school. From the Blue Ridge Mountains to the Nation’s Capital, Costa has made her presence known – and Dr. Boo looks forward to introducing Florida to her “beautiful voice.”
Dr. Kaitlin Abbott-Johnson
DVM
Cardiology Intern
When it comes to veterinary cardiology, Dr. Kaitlin Abbott-Johnson is drawn to the clarity and possibilities the field provides. She values the way echocardiography allows her to see and understand heart disease in real time, helping turn complex conditions into clear, actionable plans. From puppies and kittens with congenital defects to older, well-loved pets with acquired heart disease, she enjoys the wide range of patients she cares for—and the growing number of treatment options that can meaningfully improve both quality and length of life.
Dr. Abbott-Johnson earned her Bachelor of Science, Master of Science, and Doctor of Veterinary Medicine from Colorado State University, where her master’s research focused on degenerative mitral valve disease. She then completed a small animal rotating internship at Oregon State University before pursuing a research fellowship at QTest Labs, where she gained extensive experience in cardiac pharmacology, electrophysiology, and interventional procedures.
She then returned to Colorado State University as a cardiology research associate. Her work has included evaluating cases for transcatheter mitral valve repair (TEER), performing and analyzing echocardiograms, assisting with interventional procedures using transesophageal echocardiography, and contributing to the first publications on TEER in dogs. She has also created 3D printed heart models for surgical planning of patient specific anatomy and for educational purposes.
Dr. Abbott-Johnson is known for her collaborative approach and dedication to both patient care and client education. She believes that helping pet owners understand what treatment options are available- from medical to surgical- is essential to providing the best possible outcomes and she strives to make each step of the process clear and approachable.
Outside of the clinic, she enjoys spending time with her husband and young son, riding her horse, hiking with their two border collies, gardening, and snowboarding. She has also recently taken on the challenge of competing in triathlons.
Our Nursing & Client Care Team

Olutokumbo (Toks)
Practice ManagerMore About Toks
Toks brings 15+ years of valuable leadership to the team.

Dewey Carpenter III
Nursing Supervisor / Inventory ManagerMore About Dewey
From technician assistant to Nursing Supervisor, Dewey’s growth reflects Sawgrass’ spirit.

Krystal S
Client Services SupervisorMore About Krys
Calm, reliable leader coordinating schedules, training, and client care at Sawgrass.

Krystal A
Surgery CoordinatorMore About Krystal A
Combining skill and compassion, Krystal delivers exceptional care to every patient.

Carol
Cardiology Outpatient Care NurseMore About Carol
With years of experience, Carol provides calm, confident care to every animal she meets.

Brazil
Nurse Team LeadMore About Brazil
Energetic and compassionate, Brazil brings heart and dedication to her work in cardiology.

Amanda
Cardiology Outpatient Care NurseMore About Amanda
A skilled technician with a warm touch, Amanda brings compassion and care to every patient she meets.

Daynelle K
Nurse AssistantMore About Daynelle
Dedicated and compassionate, Danyelle is turning her love for animals into a lasting career.

Alexa
Client Services RepresentativeMore About Alexa
Kind-hearted and devoted, Alexa finds joy in caring for animals and building lasting bonds with every patient.

Andrea G
Client Service Representative Lead and Surgical CoordinatorMore About Andrea
Calm and compassionate, Andrea creates a welcoming experience for every pet and family she supports at Sawgrass Veterinary Cardiology.

Eliah
Client Services RepresentativeMore About Eliah
Ellie is devoted to creating a warm, welcoming, and comfortable environment for both patients and their families.

Mercedez
Cardiology Outpatient Care NurseMore About Mercedez
Mercedez is a calm, skilled, and compassionate veterinary professional who thrives under pressure.
Olutokumbo (Toks)
Olutokumbo “Toks” Adebusuyi is a seasoned professional in veterinary medicine with more than 15 years of dedicated experience. His journey began at Florida A&M University, where he earned his undergraduate degree in Animal Science. He went on to complete a Master of Business Administration at Nova Southeastern University, strengthening his ability to bridge clinical expertise with strategic leadership.
Toks further enhanced his credentials by earning a Certification in Veterinary Practice Management from St. Petersburg College—a qualification that allows him to combine medical knowledge with operational excellence. His unique blend of clinical understanding and business acumen has played a key role in improving the performance and efficiency of the veterinary practices he’s led.
Throughout his career, Toks has remained deeply committed to advancing animal health and welfare. His dedication to continuous learning and his pursuit of the latest developments in veterinary medicine ensure that he continues to deliver innovative, compassionate, and high-quality care to every patient.
Dewey Carpenter III
Dewey “Hamilton” Carpenter III has been surrounded by animals and the field of cardiology his entire life. But it wasn’t until the founding of Sawgrass Veterinary Cardiology that he truly immersed himself in the world of veterinary medicine. Starting out as a Technician Assistant, Dewey learned everything on the job—guided by the incredible doctors and teammates he’s had the privilege to work alongside.
Today, as Nursing Supervisor, he’s passionate about sharing that knowledge and supporting others as they grow in their own roles. While he continues to learn the finer details of leadership, Dewey’s dedication to his team, his patients, and his craft drives him to be the best he can be.
At home, Dewey’s life is filled with love (and fur). He shares his space with three cats and three dogs—three of whom live with heart conditions—giving him a unique perspective and deep empathy when caring for animals with cardiac disease.
When he’s not at the hospital, you’ll likely find Dewey at the movies or playing video games, recharging for another day of doing what he loves most: helping pets live longer, healthier lives.
Krystal Saravia
Krystal “Krys” Saravia is the Client Services Supervisor at Sawgrass Veterinary Cardiology, where she’s been a dedicated and valued member of the team since October 2022. In her role, Krys manages scheduling for both clients and staff, oversees financial processes, and leads the training and coaching of team members to ensure consistency, efficiency, and exceptional service.
What truly defines Krys is her passion for leadership and her commitment to helping others succeed. She thrives on creating a supportive, high-performing environment where every team member feels valued and empowered to grow. Known for her professionalism, empathy, and reliability, Krys takes pride in fostering strong relationships and ensuring every client interaction reflects the compassion and excellence that Sawgrass Veterinary Cardiology stands for.
Outside of work, Krys enjoys spending time with her husband and their two children, Mia and Mason, along with their four dogs—Belle, Luna, Thor, and Rose. She loves exploring new places across Florida, especially hidden local gems near Tampa, cooking, and making memories with family and friends. Whether she’s leading her team through a busy day or discovering a new spot to visit, Krys brings thoughtfulness, energy, and heart to everything she does.
Krystal A
Krystal was born and raised in sunny South Florida and has always had a passion for animal care. She holds a bachelor’s degree in veterinary medicine and is a board-certified diagnostic medical sonographer. Before joining Dr. Carpenter’s team in 2020, Krystal spent five years in general practice where she served as Head Nurse and developed a strong foundation in patient care and clinical leadership.
Krystal is known for her dedication, compassion, and steady presence. These qualities make her an integral part of the Sawgrass Veterinary Cardiology team. She takes great pride in using her skills to support both pets and their families while ensuring every patient receives the highest level of care.
Outside of work, Krystal enjoys a busy and joy-filled life with her three children, Elaynia, Emmett, and Hunter, and five pets including a Rottweiler named Poseidon, a Pitbull named Molly, two white cats named Ares and Arrows, and a ball python. In her free time, she loves entertaining, spending time with her kids, and traveling with her family to new destinations.
Carol
Carol divides her time between her full-time ICU position and her role with Sawgrass Veterinary Cardiology. Her love for animals began early in life, and she always knew she wanted to work in veterinary medicine. Since starting her career in 1988, Carol has gained extensive experience across the field, beginning in a small general practice before advancing into specialty and ICU medicine.
She has focused on cardiology since 2006 and has been working alongside Dr. Carpenter since 2009. Carol takes great pride in her ability to calm anxious patients and help them feel safe and cared for during their visits. Her compassion and steady presence make her a trusted and valued member of the team.
Outside of work, Carol enjoys listening to music, attending concerts, and relaxing at home watching movies with her three cats, Billy, Henry, and Milton.
Brazil
Brazil Scinto has always had a deep love for animals, which inspired her to begin her career in veterinary medicine in 2020 as a Nurse Assistant in an emergency room. Through hard work and dedication, she advanced to the position of Triage Nurse within just two years. Seeking new challenges and opportunities to grow, Brazil went on to work at an exotic animal clinic in Connecticut, where she further developed her skills and broadened her experience.
She now works in the cardiology department, where she continues to expand her knowledge and expertise. Brazil’s compassion, curiosity, and commitment to patient care make her a valued part of the team.
Outside of work, Brazil enjoys spending time with her two pets, Rebel and Parker, who are her pride and joy. She loves surfing, being outdoors, traveling, and sharing time with family and friends. Her passion for both animals and adventure shines through in everything she does.
Amanda
Amanda was born and raised in Florida and has always had a deep love for animals. She began her veterinary career in 2019, working as an assistant in an overnight ICU, where she quickly discovered her passion for patient care. Her dedication and eagerness to learn helped her grow into her dream role as a veterinary technician, known for her compassion and ability to make both patients and their families feel comfortable and cared for.
Amanda joined Sawgrass Veterinary Cardiology in July 2024 and is grateful to be part of a supportive and talented team that shares her commitment to excellence. She takes great pride in contributing to the practice’s mission of providing high-quality, compassionate cardiac care.
Outside of work, Amanda enjoys spending time with her husband, their daughter, and their Australian Shepherd, Link. She loves exploring new experiences with her family, learning something new each day, and making the most of life’s simple moments.
Daynelle
Danyelle has loved animals for as long as she can remember. After exploring a variety of roles in different fields, she discovered that nothing compares to the fulfillment she feels when caring for animals. Her passion for helping pets and their families inspired her to pursue a career in veterinary medicine. She is currently enrolled in a program to become a Certified Veterinary Assistant and plans to continue her education to become a Veterinary Nurse.
Outside of work and study, Danyelle enjoys expressing her creativity through tattooing and crocheting. She is excited to keep learning, growing, and turning her lifelong love for animals into a meaningful and lasting career.
Doris Hatch
Doris Hatch was born and raised in New Hampshire before relocating to Florida in 2016. Her lifelong love for animals led her to open United Dog Rescue with her son, creating a safe and caring haven for dogs in need.
In June 2022, Doris joined Dr. Carpenter and his team to deepen her knowledge and gain hands-on experience in a specialized area of veterinary medicine. She feels grateful to be part of such a dedicated and compassionate team that shares her passion for improving the lives of animals. Every day, she takes pride in contributing to a workplace that values learning, teamwork, and care.
Angelina G
Angelina was born in Philadelphia and raised in Media, Pennsylvania, before moving to Florida in 2016. From an early age, she was known for her strong work ethic and her willingness to go the extra mile to help others—whether they walk on two legs or four. Growing up surrounded by dogs, she developed a deep love for animals and dreams of one day owning a small farm filled with a variety of animals to love and care for. For now, she’s perfectly happy spoiling her beloved, fluffy orange cat, Garfield.
Outside of work, Angelina enjoys spending time with her family, especially her baby sister, and often travels back to Pennsylvania to visit loved ones. She’s also highly creative and loves expressing herself through drawing, painting, and jewelry making.
Angelina is proud to be part of her “second family” at Sawgrass Veterinary Cardiology and feels grateful to work alongside such a compassionate and dedicated team that shares her passion for helping animals.
Eliah
Ellie has had a lifelong passion for animal care, which inspired her to pursue hands-on experience early on as a Veterinary Assistant intern at multiple veterinary clinics. These opportunities strengthened her dedication to the field and deepened her love for working with animals of all kinds. With a family full of pets—and her first adopted cat joining her two years ago—Ellie has continued to expand her experience through several years of pet sitting, further shaping her commitment to compassionate care.
As a Client Service Representative, Ellie is devoted to creating a warm, welcoming, and comfortable environment for both patients and their families. She strives to ensure every client feels supported, informed, and valued throughout their visit.
Outside of work, Ellie enjoys spending time with her bearded dragon and cat, reading, sketching, and playing video games. Her blend of empathy, enthusiasm, and dedication makes her a wonderful addition to the Sawgrass Veterinary Cardiology team.
Mercedez
Mercedez’s love for animals began long before her career did. Raised around pets her entire life, she always knew she wanted to dedicate herself to caring for and advocating for them. Before joining Sawgrass Veterinary Cardiology, she spent eight years in ER/ICU veterinary medicine, where she developed a deep passion for helping patients through their most critical moments and supporting the families who love them. Her extensive emergency experience has shaped her into a calm, skilled, and compassionate veterinary professional who thrives under pressure.
If she could choose one superpower, Mercedez would love to communicate with animals—something that perfectly reflects her empathy and connection to the patients she serves.
Outside of work, Mercedez is a proud mom to her amazing 6‑year‑old daughter, who is truly her whole world. Together, they enjoy going on little adventures, whether it’s trying new restaurants, playing at Chuck E. Cheese, binge‑watching their favorite shows, or indulging in spontaneous shopping sprees.
Mercedez brings warmth, experience, and heart to every interaction, making her a wonderful part of the Sawgrass Veterinary Cardiology team.
Andrea G.
Andrea is the Client Service Representative Lead and Surgical Coordinator at Sawgrass Veterinary Cardiology, where her lifelong love for animals has only grown stronger since she entered the veterinary field in 2019. She understands that visiting the vet can be stressful for both pets and their families, and she is committed to making every experience as smooth, supportive, and comforting as possible. Andrea strives to create a warm, welcoming environment where clients feel heard, cared for, and guided every step of the way. Building meaningful connections is essential to helping each family navigate their pet’s journey with confidence.
When she’s not at work, Andrea enjoys cooking and baking new recipes for her husband—her enthusiastic taste tester. She also loves painting mini figurines and getting lost in a good book. At home, her three fur‑babies—Gunner, Yuno, and Draco—remind her daily why she is so passionate about the work she does and the families she supports.
