Dr. Rebecca Holmbeck leads our equine sports medicine program with a deep commitment to keeping horses feeling and performing their best. As both a veterinarian and a Certified Veterinary Spinal Manipulation Therapist (chiropractor), she blends advanced diagnostics with specialized therapies to create individualized care plans for every horse. Her whole-horse approach and genuine passion for helping both horses and riders make her an invaluable partner for anyone seeking the highest level of care.
She served as a veterinary technician in the U.S. Army from 2003–2007 before earning her DVM from the University of Illinois in 2014. She completed acupuncture training at China Agricultural University during her clinical year and became certified in chiropractic therapy (CVSMT) in 2016 to further support equine athletes. As an avid horsewoman herself, she understands firsthand what it takes to keep horses moving and feeling their best—and she brings that experience into every case she treats.

Dr. Hoyt Rees leads our cattle and equine reproduction services with a deep passion for reproductive science and the innovation that drives it forward. He has managed and implemented embryo programs for large dairies, vertically integrated beef operations, and elite family-run show herds across the country. With a unique blend of clinical expertise and real-world program management, Dr. Rees approaches each case with precision, partnership, and a commitment to helping clients reach their breeding goals.
He earned his DVM from the University of Illinois in 2014. He went on to practice bovine medicine in Idaho, where he founded and operated a successful independent IVF lab and embryo transfer business starting in 2016. After selling that business and returning home to Illinois in 2023, he brings both extensive reproductive experience and a practical, producer-focused mindset to StillGrass. His understanding of the financial, genetic, and management considerations behind every breeding program allows him to guide clients through the process with clarity, care, and confidence.

Kayla’s strong organizational skills, warm leadership style, and commitment to client care help keep our practice running smoothly.
Her genuine, welcoming nature creates a warm, enjoyable experience for everyone while ensuring our team has the support they need to deliver exceptional service. Her ability to coordinate people, schedules, and the many moving parts of a busy clinic makes her an invaluable part of the StillGrass team.
She grew up on a farm and now raises grass-fed beef and laying hens alongside her husband, two children and several horses. She has been an integral part to the success of the Lasalle County 4H program for the past several years. Her lifelong connection to livestock and horses gives her a practical, day-to-day understanding of the animals we care for and people we serve.

Jen oversees every aspect of our advanced reproduction services — from procedures in the field to the precise laboratory work. Her meticulous attention to detail and commitment to quality play a vital role in achieving successful reproductive outcomes for our clients.
A lifelong animal enthusiast, Jen grew up riding and showing horses, and her family continues to raise cattle in the Morris, IL area. Her background gives her a firsthand understanding of both the equine performance world and the goals of serious breeders.

Griffin works closely with Dr. Holmbeck to support a wide range of treatments and procedures. Her calm, confident approach and strong horsemanship skills make her an invaluable part of our equine sports medicine team.
Growing up riding horses and continuing to play polo whenever she can, Griffin brings years of hands-on experience in the competitive horse world. Her deep understanding of what it takes to keep horses comfortable, sound, and performing at their best allows her to handle horses safely in any situation and to support the advanced care we provide.

Jim and Mike are both retired tradesmen with decades of construction experience, they are the steady hands and problem-solvers behind the ongoing buildout of our ever-growing clinic. Whether they’re setting fence posts, operating equipment, or framing walls, Mike and Jim keep the wheels turning (and the walls standing). Their practicality, craftsmanship, and positive attitudes have become part of the heartbeat of our work-in-progress facility.
Beyond their skills, they both bring something just as important - good company. They’re the kind of people you’re always glad to have around—quick with a story, steady through the hiccups, and endlessly patient with the chaos of construction on a working veterinary clinic.