Veterinarians

Dr. Marianne Marshall-Gibson

Owner/Veterinarian

Dr. Marianne Marshall-Gibson grew up caring for clients’ horses and assisting veterinarians at her parent’s 54-stall Hunter/Jumper and Dressage facility in the Chicago suburbs. She began riding at age six and later competed in hunters and equitation in USEF/USHJA shows.

Dr. Denise Branecky

Associate Veterinarian

Dr. Denise Branecky grew up in Newtown, Connecticut where she was introduced to horses and riding at a young age through her mom’s love of horses.

Support Staff

Patty Hagan

Office Manager

Patty was born and raised in Colorado. Her interest in horses started at a very young age and has remained an integral part of her life ever since! She loves animals of all kinds and has always enjoyed having them and working with them. Around age 9, she got her first

Allison Lancaster

Rehabilitation Assistant

To her parents' dismay, Allison never outgrew her “horse phase.” What began as a childhood fascination quickly evolved into a lifelong passion when she started riding lessons at age six.

Maya Cohen

Junior Rehabilitation Assistant

Maya has been riding and tending to horses since she was 5 years old. She met Dr. Marshall at 7 when she was providing a vet check for her Shetland pony Little Dixie. For the last 7 years Dr. Marianne has been an integral part of her horse life.

Morgan Willis

Facilities Assistant

Morgan's lifelong love of horses began at six years old in Columbia, South Carolina.

Whitney McMillan

Rehabilitation Barn Manager

Whitney graduated from Colorado State University in 2010 with a double major in Equine Science and Business Marketing.

Natalie Zavorskas

Veterinary Assistant/HR Manager

Natalie was born and raised in New Jersey where she grew up riding horses, playing field hockey, and performing on the stage of her local community theater.

Anna Munro

Rehabilitation Assistant/Facilities Manager

Anna graduated CSU in 2018 after earning a degree in Equine Science. She worked as a wrangler at a summer camp for a few years before deciding to stay in Fort Collins.

Devon Brown

Veterinary Assistant/Events Coordinator

Devon grew up in Sun Valley, Idaho where she spent her childhood racing down mogul runs and competing alongside her horse, Maggie, in everything from ranch sorting and high school rodeo to cutting and beyond.

Bill Marshall

Practice Manager/Chief Financial Officer

Raised in the Laurel Mountains of Western Pennsylvania, Bill worked weekends and summers on his grandfather’s tree farm.

Sponsored Riders

Jimmy Daurio

Sponsored Rider

I was born and raised in Pueblo Colorado and was horse crazy since I could walk. I grew up showing in local saddle clubs , 4-H and RMQHA. 

Sierra Neiberger

Sponsored Rider

My name is Sierra Neiberger. I was born and raised in a small mountain town in Colorado. My husband and I work full time on our cattle ranch and I work part time as an EMT.

Jessica Greer

Sponsored Rider

Jessica Greer is a Grand Prix dressage trainer who has been riding 30+ years, 17 of those as a professional.