Sabrina Jacobs, DVM  –  Owner

Dr. Sabrina Jacobs is the owner and founder of the Performance Equine Vets and Performance Vet Supply.  A Texas native, she graduated from Texas A&M College of Veterinary Medicine in 2004. Dr. Jacobs has a particular interest in advanced reproductive techniques. She has performed thousands of oocyte recoveries and embryo transfers. Dr. Jacobs is proficient at performing the most complicated embryological procedures, such as Intracytoplasmic Sperm Injection (ICSI), Embryo Biopsy for Preimplantation Genetic Diagnosis (PGD) and Embryo Vitrification (Embryo Freezing). Tasked with leading the team, she is passionate about optimizing every detail of the process to ensure the best possible results. Dr. Jacobs is held in high regard by colleagues and clients alike for her advanced skills, leadership and deeply caring attitude. Dr. Jacobs is a professional member of the American Associateion of Equine Practioners (AAEP), the American Veterinary Medical Association (AVMA), and the Society for Theriogenology (SFT). She is licensed to practice Veterinary Medicine in the states of South Carolina, Georgia, Florida, Mississippi, Texas, North Carolina and Tennessee. 

In her free time, Sabrina enjoys tinkering in her ever growing garden and spending time with her husband Clay and daughter Ansley. 

Stephanie Caston, DVM, Diplomate ACVS  –  LA Surgeon

Dr. Caston grew up in Southeast Texas, she is a specialist veterinary surgeon and a 2002 graduate of the College of Veterinary Medicine at Texas A&M University. After completing a one year internship at Iowa State University, she remained on staff to finish her surgical training and achieve her diplomate status. Dr. Caston then accepted a position and spent the next 15 years at Iowa State in academia servicing an extensive sport horse community in both surgery and advanced lameness diagnosis. Dr. Caston has been actively involved in numerous research projects including, complicated lameness, orthopedic and musculoskeletal surgeries, emergency surgical colic interventions, advanced imaging and regenerative medicine. She has authored over 150 scientific papers and book chapters on topics ranging from orthopedic and musculoskeletal surgery, developmental orthopedic disease, minimally invasive procedures, advanced upper airway surgical techniques, as well as regenerative therapies including Stem Cells, IRAP and PRP. As a recognized specialist in her field, Dr. Caston is an invited speaker in both national and international conferences on various topics each year. Dr. Caston is involved as an active competitor in Three-Day Eventing. She utilizes this unique knowledge daily as she applies her experience as a rider to her profession as a Veterinarian.

When she is not working, Dr. Caston enjoys competing her own horses in eventing, fox hunting, and spending time with her dogs.

Douglass Berry II, MS, Diplomate ACVS  –  Surgeon

Dr. Berry is board certified surgeon and has extensive experience as equine surgeon and educator with interest in sports medicine, young horse training, orthopedics and rehabilitation.

Rachelle Thompson, DVM –  Internal Medicine

Dr. Thompson obtained her doctor of veterinary medicine from Virginia-Maryland College of Veterinary Medicine in Blacksburg, Virginia in 2017. She then completed an internship at B.W. Furlong and Associates in Oldwick, New Jersey. Afterwhich, Dr. Thompson accepted a position at Cornell University College of Veterinary Medicine to obtain her residency training in Internal Medicine and her diplomate status. Dr. Thomson’s special interest include neonatal medicine, neurological disease, respiratory disease, colic workup and preventative health. She has contributed extensively to active research in the field of equine gastric ulcer syndrome. Dr. Thompson excels in client communication, where she truly enjoys educating clients and helping them work through challenges with their horses. 

Originally from West Virginia, Rachelle drew a picture of herself in school as a Veterinarian when she was only five years old. Rachelle’s background in riding horses began in Eventing, where she actively showed for several years. She enjoys sewing and loves to hike when she can spare some free time. Rachelle has three horses, Gingersnap, Willie, and Lucy.


Breanne Maraman, DVM, CVA

An Alabama native, Dr. Maraman’s interest in horses began remarkably early in life. Her love of horses originated from her mother, Randy, who blessed her with pony rides before she was able to walk. Dr. Maraman was destined to pursue a career in Veterinary Medicine and graduated from Auburn University in Auburn, Alabama. She spent a year at Elgin Equine Hospital in Texas before joining us at Performance Equine Vets. Dr. Maraman’s professional interest include Emergency Medicine, Preventative Health Care, Integrative and Alternative Medicine, as well as Anesthesia. She is certified in Veterinary Acupuncture from the Chi University under the direction of Dr. Xie, one of leading authorities in Veterinary Acupuncture. Dr. Maraman has commendable interpersonal skills, tenderness and the ability to communicate effectively with her clients in a compassionate and caring manner. Dr. Maraman is pleased to offer small animal services both in the clinic and on the farm. 

Each Autumn, you will find Breanne adorned in orange due to her passion for Auburn Football. When she is not in the clinic, she is most likely snuggling on the couch with Tootsie and Finn (her two dogs) or bathing her horse, Cupid, who she has cared for over 21 years. Breanne has an adorable boyfriend Mike, whom together have a keen interest in baking and cooking scrumptious dishes.

Casey Cromer, DVM

Dr. Cromer graduated from Cornell University with her Doctor of Veterinary Medicine. Formerly with Rood and Riddle Equine Hospital in Lexington, Kentucky, she headed south to Aiken and became an integral part of our team at Performance Equine Vets. Dr. Cromer is passionate about advanced reproduction with a focus on infertility in the mare, transvaginal oocyte aspiration and neonatal medicine. She also has a strong background in Equine Medicine, and enjoys the challenges and difficulties of the more advanced cases. She is uniquely skilled in her technical aspects of Veterinary Medicine and is proud of the work she does at Performance Equine Vets, where we feel all patients should be treated like family. Dr. Cromer truly embodies this philosophy and treats her patients with empathy, sensitivity, and warmth which has been noted by so many of our clients. Among her other talents, Dr. Cromer has authored numerous research articles relating to equine reproduction and infertility in the mare. 

When she is not taking care of her patients, Casey enjoys riding her two Thoroughbred geldings, Manny and Shark and hanging out with her pack of dogs and cats and of course spending quality time with Bryce! 

Jose Zambrano –  Veterinary Assistant, Stallion Manager

Born in Michoacan, Mexico, Jose began his career in the United States in 1991. His addiction to horses began at the racetrack Delaware Park, where he began as a groom and was promoted to the title of Assistant Trainer. After spending 15 years working at Delaware Park, Jose relocated to Aiken with his family. Jose joined Performance Equine Vets in 2014. He naturally became the head stallion handler with his gentle nature and calming personality, he is truly an asset to our operation.

Jose is the proud father of three wonderful children, Pepe, Heidi, and Omar. He is expecting his first granddaughter this spring. Jose enjoys managing his elaborate garden and spending time riding his horses while he is away from the hospital.

Taryn Sheehan –  Patient Care Specialist

Taryn was born and raised in the Commonwealth of Massachusetts. Her passion for horses started quite early in life at the young age of seven when she started taking lessons and riding in an elite Hunter-Jumper barn in Boston. Prior to moving to Aiken, Taryn solely managed a bustling boarding operation with over forty horses. During those six years, she developed a comprehensive lesson program for young riders and taught upwards of fifty lessons per week. Taryn truly enjoyed traveling to shows up and down the east coast with her students while helping them to develop their riding skills. Although it was hard for her to leave, she absolutely loves it here in South Carolina and couldn’t imagine herself doing anything else. Taryn is trained in Advanced Equine Medical Massage and is an invaluable resource for our patients. Among her other talents, Taryn is one of the most dedicated individuals we have had the joy of working with. 

While her primary focus is always with the horses, she loves spending time at the lake, watching hockey, playing soccer, and experimenting in the kitchen. If she is not on a horse, you might find her with her boyfriend Pat, five dogs (Jack, Teddy, Tyson, Nova, and Eli), and two horses Yankee and Twist. 

Cheyanne Gray –  Surgical Coordinator and Patient Care Specialist

Cheyanne is from the South Carolina low-country where oysters, fish and low country boils are a rite of passage.  Cheyanne joined the PEVS team in 2019 and is an avid rider.

Marcella Dragolich –  Equine Embryologist

Marcella joined the team at Performance Equine Vets, after her education at The Ohio State University. Her particular interest is in Equine Embryology, she is trained in advanced micro-manipulation techniques for Intracytoplasmic Sperm Injection (ICSI), Embryo Biopsy, and Embryo Vitrification. When not in the lab, Marcella derives some of her greatest joy from delivering new foals! She possess compassion, dedication, and a strong work ethic. Marcella has been an avid horse lover from a very young age, and plays a vital role in our operation by coordinating all reproductive procedures, including new patient check in, Oocyte Harvest procedures, ICSI Mare management as well as Embryo Flushes. She also jointly manages our extensive recipient herd with Emily Jones.

Marcella enjoys gardening, camping, and running marathons with her dog Lucy.

Emily Jones, M.S. Equine Reproduction –  Stallion Manager, Director of Client Services (Reproduction)

Emily is Clemson graduate with her bachelors degree in Equine Business. During her stay at Clemson, Emily interned with us for two summers. After graduating from Clemson, Emily accepted a position at Kansas State University where she obtained her Master’s in Equine Reproductive Physiology. After leaving Kansas, she headed out west to manage a privately owned breeding and foaling operation. Emily was excited to join us here at Performance Equine Vets. She brings to us extensive training in stallion management and semen preparation. Her combination of medical knowledge and professional experience has proven especially useful to our clients and patients. A warm and compassionate multi-tasker, she works to ensure each and every client and patient receive unparalleled communication and care. Emily tackles each of her numerous duties with passion, relishing the opportunity to educate clients throughout the process.  On top of everything else, Emily also assists in management of the recipient mare herd with Marcella.

Emily enjoys spending time relaxing at the beach and taking her dog for long hikes. She loves to cook and consistently bakes yummy treats! Although Emily has been a western girl most of her life, she has recently begun training in dressage.

Jess Fisher –  Horse Defense

Jess Fisher hails from the land of Yankees, but we love her anyway.  A long term resident here in Aiken, Jess brings years of experience and tons of knowledge to the table.

Katherine Miller –  Inventory Management

Graduating from Clemson University in 2018, Katherine’s focus has been on Clemson her entire life.  We were lucky that she left Clemson and came to work in Aiken.  Armed with a degree in Equine Business the stars were aligned and well… as they say… the rest is history.

While Katherine is a Clemson  at heart, she and her dog love spending their time enjoying the rivers, hiking trails and parks that are so readily available here in Aiken. Family is very important to Katherine, she spends as much time as possible with her family. She stays busy outside of work through her involvement in church.

Peggy Keeler –  Corporate

Originally from Connecticut, Peggy bought her first pony when she was just 10 years old. Her career in horses began on the open hunter and jumper circuit where she actively showed for over ten years. Peggy graduated with her Bachelors Degree in Physical Education from the University of Connecticut in Storrs, Connecticut. After college, she made a transition to the racetrack for five years, where she was a groom and exercise rider in Rhode Island. Following the racetrack, she entertained herself with Eventing, Hunter Pacing, Foxhunting and then eventually found her passion in Driving. During this time, Peggy was managing a thriving miniature horse breeding and show barn in Bridgewater, Connecticut. After that adventure, Peggy accepted a position at the New England Equine Practice in Patterson, New York. In 2015, she and her husband made the move to Aiken, to enjoy the sunshine and the wide variety of equestrian activities. Peggy began at PEVS assisting with the NICU, and was quickly swept up into a part time position. There are few tasks at the clinic that Peggy doesn’t have her hands in, she is truly an asset to our daily operations.

Peggy is an active competitor in both Pleasure Driving Shows and Combined Driving Events. When Peggy is not at the clinic lending a hand, she is most likely spending time with her husband Jerry, their three horses, Celtic, Dan, and Daisy or their two cats, Missy and Stoney. She stays busy outside of work taking long walks with Dillan, her Swedish Valhund, and volunteering at local riding and driving events. 

April Leeman –  Client Services

Hailing from the great state of Maine, April brings more than horse experience to the PEVS team.  April brings dogs AND experience 🙂

Dominique Matos –  Client Services

The youngest member of the PEVS Team, Dominique is an avid photographer and dressage enthusiast.

Clay Jacobs  – Operations & Finance

Clay is the man behind the scenes, providing direction, operational guidance and financial engineering for the company.  Sabrina and Clay were married in 2002 and immediately began a journey to identify the best location to start an equine practice.  Landing in Aiken the fall of 2004, Clay began the acquisition of properties and worked to design what we now know as Performance Equine Veterinary Services International, complete with an Online/800 Veterinary Supply that services thousands of clients around the world.