An equestrian center committed to building community and confidence

At Horses for a Change, we operate on the foundation that everyone is welcome. We understand the transformative power of horsemanship and want to share it with our community. We’re dedicated to nurturing a love of horses in all who are interested, regardless of your background.

We take this same approach with our horses. Many times horses come to us neglected or abused, and it is a wonderful thing to see their transformation as they work with our trainers, and eventually feel at home here and build bonds with our staff and riders.

Our Mission

  • To provide a safe haven for abandoned horses where they can be re-educated as school mounts and show horses.
  • To provide equine assisted therapy for those on the autism spectrum as well as for children, adolescents and adults with mental health needs.
  • To provide an opportunity for disadvantaged youth to learn horse care and riding, in order to build empathy, leadership and appreciation for nature.
  • To assist dedicated riders in pursuing the equine discipline of dressage.

Our Location

Horses for a Change is located at Frog Hollow Farm, a 135-acre paradise located in Esopus, in the Hudson Valley of New York state. Nestled in the hills near the Hudson River, the farm provides a sanctuary to help you reconnect to nature.

Here you will find two indoor arenas, a full size dressage arena with an upstairs viewing area and kitchen and bathroom. There is also a small dressage arena at the top of the hill.

In addition to the programs offered through Horses for a Change, Frog Hollow Farm offers boarding for horses.


Click the map to get directions

Our Team

Nancy Rosen

Owner / Trainer
Nancy is the owner and founder of Horses for a Change and Frog Hollow Farm. She is American Riding Instructor Association (A.R.I.A.) certified in combined training to Level II. She has been an event rider and has competed through Prix St. Georges in dressage, earning a USDF bronze and silver medal in that discipline. Nancy also has a Masters in Social Work, which, combined with her extensive experience working with children with disabilities, led her to establish "Horses for a Change" in 2001.

Robbi Nanni

Director of Therapeutic Riding
Robbi is a certified PATH (Professional Association of Therapeutic Horsemanship) instructor and a graduate of SUNY Morrisville in Equine Science. She has been a horse owner for over 10 years. Originally from the Hunter Jumper world she has found her passion in dressage. Having volunteered at Winslow Therapeutic Riding Center, not to mention Frog Hollow and Horses for a Change since the beginning, she is now a beloved instructor, passionate about nurturing and building confidence in children and adults alike.

Mary Zak

Instructor and Trainer

Mary joined our team in 2015, bringing more than 40 years of riding and 30 years of teaching experience. She has been an avid rider since childhood, and began teaching riding lessons in college. Mary studied Hunt Seat Equitation at the Overpeck Riding Center in New Jersey and has worked with international dressage rider Heidi Ericksen and event rider Karen “Cheech” Barber.

Mary has decades of practice with “problem horses” and helping others find balance and positive progress in riding. At Frog Hollow Farm, Mary is an active support in our therapeutic program, teaches both children and adults in our riding school, and trains horses to work in both programs. She loves jumping and riding across country as well as pursuing the art of dressage to refine communication between horse and rider, while promoting the athletic development and mental balance of both.

Tiffany Banks

Assistant Barn Manager

Tiffany started riding at Horses for a Change in the summer of 2015. From a fearful beginner she progressed rapidly in her riding and horse management. Now she confidently handles the horses—grooming, saddling and bridling them, as well as taking them from stalls to paddocks and back.

Perhaps most importantly she is so attuned to the behavior and well being of each individual horse that she zeroes right in on potential health problems. She helps our inexperienced students with grooming and tacking up. She has shown and trained Mustang Sally and lunges and exercises our school horses.

Hannah Corjulo

Part-Time Instructor & Trainer

Hannah’s love of dressage started when she was 12 years old when she took her first lesson at Frog Hollow Farm. Since then she has made it her life’s ambition to succeed in the sport. She’s worked hard and ridden every backyard pony that was thrown her way, hoping this would one day lead to a break through.

Last year her dreams came true. She purchased the horse of her dreams, Blues Singer (aka Pippa). Pippa is a 2006 Dutch Warmblood by Sir Sinclair, out of Priceless. Together they have worked hard laying the groundwork to come out strong in the 2018 show season. She’s hoping to show 4th and PSG this year, aiming for a spot at nationals.

Want to stay up to date with what’s happening at Frog Hollow Farm?

Follow us on Facebook, or subscribe now to get all of our latest news directly to your inbox.