About Us

True North Equine Veterinary Services
Devoted to improving the health and well-being of equine patients, from backyard companions to elite athletes of all disciplines, using integrative medicine.

True North Equine is a collaborative effort between Dr. Hancock and Dr. Tim Rogers.  We offer the best methods of conventional and complementary medicine to enhance performance, improve quality of life, and foster the horse-rider bond. We strive to go beyond a strictly business relationship by welcoming owners and their horses into our practice family. We operate with utmost integrity and open-mindedness, and clients can trust that in our practice, the well-being of the horse always comes first.

Ann-Marie Hancock, DVM, EDO

Ann-Marie Hancock was raised in the San Francisco Bay Area of Northern California, where she was active in Pony Club and competed in lower level three day eventing horse trials. Ann-Marie completed her studies at Colorado State University in Fort Collins, Colorado, graduating with a BS in Equine Science, an MS in Anatomy and Neurobiology and a DVM in 2003.


Dr. Hancock purchased Rectortown Equine Clinic in 2013 and after several successful years decided to embark on a new endeavor.  She relocated the practice to Marshall, Virginia where she intends to build a new facility and changed the practice name to True North Equine Veterinary Services.  The clinic will be a hub for the team of practitioners supporting equines in any life stage or discipline, providing a convenient, clean, and friendly work environment for dentists, farriers, saddle fitters, massage therapists, etc.  

Tim Rogers, DVM

Tim's love for horses started when he was a kid and learned how to ride English during summer camps. His family had a Thoroughbred named 'Sunny' but he had a penchant for jumping fences on his own to visit his buddies at the University of Tennessee Equestrian Center, so Tim spent more time feeding carrots than actually riding his sisters' horse. He has enjoyed many things in life including horse packing in the Rocky Mountains, becoming a Pilates instructor and Rolfer and many adventures Cycling.

He attended Colorado State University's College of Veterinary Medicine where he tracked large animal and pestered his teachers with lots of questions about horses and physical therapy. Tim then later finished training at the Vluggen Institute for Equine Osteopathy. Tim graduated with Masters in Acupuncture and Oriental Medicine from Southern California University of Health Sciences. As well as completing Animal Chiropractic training for veterinarians at Parker College of Chiropractic. He has always had a strong interest in physical therapy and volunteered in human sports medicine clinics and even served as the dissection teaching assistant for several years at Colorado College of Chiropractic. Additionally he is a twice- graduate of Mission Farrier School. 


Tim's veterinary interests are especially involved with physiotherapy, equine osteopathy and podiatry. He continues to study deeply in the field of human rehabilitation so he can bring this state-of-the-art knowledge into the equine world. His passion is in combining these interests to help our equine companions find freedom from pain as well as a greater ease in movement and life.


Callie Heinle, Osteopathy Apprentice and Massage Therapist

Callie Heinle was born and raised in Ramona, California, where she acquired her love of horses at a young age due in part to her mother’s role as the in-house trainer at North Arabians. She grew up riding hunter/jumpers for much of her childhood, then transitioned to reining horses in her teen years. As an adult, Callie strives to further her horsemanship and knowledge of horses by studying under some of the top horsemen in the industry. She has had the opportunity to intern with Trevor Carter on his ranch in New Mexico, participating in colt starting and the schooling of reined cow horses and working ranch horses. She enjoys continuing to develop her own horses in English and Western disciplines.


In 2016, Callie attended equine massage school in Ocala, Florida at Animal Dynamics for Massage and Electro-Acupressure. She is a certified equine massage and electro-acupressure therapist. Later finding Prancing Pony Body-work and meeting Dr. Hancock. She has been studying Osteopathy and apprenticing with Dr. Hancock since 2018 and is now taking appointments of her own with True North Equine for Osteopathy. 

Callie’s other interests include: hiking, camping with friends and family, and traveling. She is an avid reader who enjoys collecting various horse and history books.

Carin Brown, Veterinary Assistant and Certified Equine Thermographer

Carin is a life long Equine Enthusiast who has always had a passion for helping animals and riding horses. She has been teaching riding lessons since she since 2007, and riding before she could walk. As an H-B Pony Club Graduate she has ridden in a variety sports from Games to Eventing through her riding career. In 2008 Carin represented the United States on the International Games team that competed in Australia. Since then she has coached riders in games and general riding lessons. In recent years she has also become very involved in the Eventing community and was a working student for Skyeler Voss at the wonderful Morningside Training farm in the Plains VA. She has also worked as a working student for Cathy Fredrickson and Sharon Miller. Throughout College she rode with the Equestrian Team and competed in Hunter/Jumpers and ANRC competitions. Carin is currently competing in Eventing (Preliminary) and Dressage (3rd level).


She graduated from Bridgewater College in May of 2014 with a BS in Health and Exercise Science and a Minor in Equine Science. Following graduation Carin completed her training in Equine Thermography.  In November of 2014 she became a Certified Infrared Thermographer and started her own business, so she could pursue her passion for helping horses. 

Meredith Pless, CFO & COO

Meredith has been riding horses since the age of 3 and competing on the AA show circuit as a

hunter/jumper up and down the east coast since the age of 12 up until 2016 when she took a

hiatus from riding and focus on finishing college and getting her career underway. She has a

degree as a dual major in Finance and Marketing with a minor in White Collar Crime from West

Chester University. During enrollment in college, she began working at a hedge fund

management firm outside of Philadelphia as an Executive Assistant. She worked her way up the

ranks and upon graduation became a Trader. After 3 years at the firm, she decided it was time to

make the move down to Northern Virginia to be in the state she has loved and now has her

family in.

Once settled in Virginia, she began a job in Sales, but soon found that was not the

right fit for her and she wanted to get back into finance, as well as something related to horses, as she plans to begin riding again. The position at True North Equine Veterinary Services just

happened to be open at the right time and this is the perfect way for her to be able to incorporate

all her finance and business operational and logistics insight, as well as passion for horses. Her

bubbly, upbeat, and happy go-lucky persona is also perfect for answering the phone and to put a

smile on your face

Laurie Eller, VP of Operations

Laurie was born and raised in Arizona where she grew up showing Quarter Horses in both Western and English.  She became an accomplished team roper and was the Arizona Women’s Professional Rodeo Association Barrel Racing Rookie of the Year.  Before finishing college, Laurie was crowned Miss Rodeo Arizona and runner up to Miss Rodeo America.  While attending Colorado State University, Laurie worked at the CSU Stallion Lab and rode young cutting horse prospects for Tee Cross Ranches in Pueblo, CO.

After graduating from Colorado State with her bachelor’s degree in Animal Science, Laurie was the Communications/Marketing Director for the Colorado Cattle Feeders Association, Executive Vice President of the American National CattleWomen’s Association, and after marrying and moving to the northern Virginia area, became the Executive Director of the Animal Industry Foundation.

Laurie took time away from her professional life to raise and homeschool their two daughters while teaching them ride and show hunter ponies at local and A-rated shows.

20 A John Marshall St, Warrenton, VA 20186
Phone: 540.364.9111  Fax: 540.364.9211 
office@truenorthequinevet.com | 9am-5pm Mon-Fri
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