Scott W. Hansen, DVM

Dr. Scott Hansen has been interested in horses since his teens. He first pursued a career as a farrier in Nebraska after attending Oklahoma Farrier College. After being exposed to the equine veterinary medicine world while working for a year, Scott decided to become a veterinarian. He continued to work as a farrier while attending Iowa State University College of Veterinary Medicine until he graduated in 1980. He then moved to the Gresham area and opened a solo equine-only ambulatory practice in 1983, focusing primarily on race horses.

Scott’s interest in lameness and surgery grew while working at the track. He opened his current hospital in 1985 with a surgical facility to be able to provide a higher quality of care for his patients. His practice has grown much larger than he had ever imagined, with its emphasis shifting from racetrack work in the mid 1990s to sport horse and companion animal medicine and surgery.

Scott has remained intrigued by equine medicine by staying up to date with the latest technologies and advances in the field. Throughout his practice life, Scott has found the most rewarding aspect has been the people he has met and the horses he gets to work with everyday. His main interests have been lameness, surgery, farrier science, and diagnostic imaging.

Greg Schmid, DVM

Dr. Greg Schmid was born in Canada and grew up in Vancouver, British Columbia. He was fortunate enough to be raised with horses in his backyard and was an active Pony Club member throughout his youth. In 1999 his family and their horses moved to Ohio, where Greg continued with school while training horses and teaching riding lessons. He completed his undergraduate studies in the Equine Science program at Otterbein University and competed on the Intercollegiate Dressage and Hunt Seat teams. He spent his summers as a working student for various trainers along the East Coast, and while traveling he had opportunities to assist and shadow several equine veterinarians.

Greg attended veterinary school at The Ohio State University, and then completed an internship at B.W. Furlong & Associates, a prominent equine practice in central New Jersey. Afterward, he continued his career as a sporthorse veterinarian working with mostly hunters and jumpers all over the northeast in the summer, and sunny Wellington, FL during the winter. He has a strong interest in lameness exams, diagnostic imaging and farrier science, but mostly enjoys helping owners with their horses in any way possible.

Although he enjoyed working with many great horses and trainers out east, Greg is excited to return to the Pacific Northwest. In his free time, he enjoys skiing and hiking and is hoping to get back in the saddle soon!

Christy Sandquist, DVM

Dr. Christy Sandquist hails from the beautiful Applegate Valley in Southern Oregon. Horses have always been the center point of her life as an equestrian and in her career.

From a young age Christy relished her time in the saddle, whether it was exploring the beautiful Oregon landscape trail riding and horse camping or preparing for competition. Christy spent a number of years in 4-H, on her high school equestrian team, competing in open horse shows and representing Oregon State University on their intercollegiate equestrian team.

Christy’s professional training began at Oregon State University where she earned her bachelors degree in pre-veterinary medicine and equine sciences. Advancing her career, she then earned her Certified Veterinary Technician license in Oregon. Christy worked for years as a licensed technician in small animal emergency and critical care, small animal specialty surgery and all aspects of equine medicine, With a passion for medicine and to further her education, Christy pushed herself to earn admission into veterinary school. Christy studied at Oregon State University College of Veterinary Medicine and graduated with honors. Christy completed her veterinary internship at Pioneer Equine Hospital in Oakdale California and gained advanced training in equine internal medicine, surgery, sports medicine, emergency and critical care, advanced imaging (including digital radiology, ultrasonography, edoscopy, MRI and CT), general anesthesia, dentistry and reproduction. Christy is dedicated to and passionate about all aspects of equine medicine and serving her equine patients in any way she can.

During her free time, Christy can be found out enjoying the wonderful outdorrs with her dog. Her adventures consist of traveling, hiking, camping and spending time with her family and friends.

Paul Duff, DVM

Paul Duff is a native to Columbus, Ohio. He learned to love horses after his family became involved in the cutting horse industry breeding and showing Quarter Horses. After graduating from Iowa State CVM, he completed a 1 year internship at Littleton Equine Medical Center, rotating between surgery, medicine, field, and emergency services. After the internship Dr. Duff returned to Columbus, OH to join Bella Vista Equine Veterinary Services, focusing on the performance horse. Dr. Duff also worked a breeding season in Colorado, focusing on the problem mare, semen processing, and neonatal care. He comes to the northwest excited to join CEH! His interests include reproduction, lameness, surgery, dentistry, and integrative medicine. In the free moments Dr. Duff loves all things outdoors, climbing, hiking, biking, playing music, and enjoying nature with his two dogs, Ellie and Rocky.


  • Undergraduate: Zoology, Miami University 2010
  • Doctor of Veterinary Medicine: Iowa State University College of Veterinary Medicine 2014
  • Internship: Littleton Equine Medical Center 2014-2015
  • Certified Veterinary Medical Acupuncture, CVA
  • Certified Veterinary Chiropractic, IVCA

David O. Klugh, DVM

Dr. Dave Klugh graduated from Washington State University College of Veterinary Medicine in 1981. After five years of mixed practice, he and his wife purchased an exclusive equine practice in Newberg, Oregon, in 1986. Dave’s interest in equine dentistry led him to become certified at all three levels of expertise (basic, advanced, and examiner) by the International Association of Equine Dentistry (IAED), where he currently assists in oversight of all certification procedures as a member of IAED’s Certification Committee.

In 2003, he became the first Equine Fellow in the Academy of Veterinary Dentistry, laying the groundwork for further elevation of equine dentistry to the level of a specialty in veterinary medicine.

Paul Scherlie, DVM, Diplomate, AVCO

Consulting Veterinarian

Megan Cormack, Practice Manager

Megan is a Portland local who joined the practice in 2006. She grew up riding and showing Tennessee Walking Horses. Currently, she enjoys managing her small farm in Eagle Creek with her husband and young daughter Ava. They have two dogs, Suki and Zoe, two Tennessee Walkers, Kojak and Penny, and a whole gaggle of chickens. Megan spends her free time hiking and camping with her family, gardening, playing in the kitchen with her daughter and riding.



Alexis Champagne, Office Manager

Alexis joined Columbia Equine Hospital May 2012. She came to us with over 13 years of small animal veterinary experience and 5 years of equine practice management. Alexis moved from Rhode Island in 2004.

When she is not greeting you over the phone or meeting you in the office, she is likely paddling with one of her dragon boat or outrigger canoe teams, or at a Timbers game!

Teryn Zirk, Receptionist

You will find Teryn in the office on Saturdays. When she’s not at work, she’s at home with her little boy, Daniel and her husband Ryan. She has her own zoo at home, with three dogs, three horses and a couple of cats.

Mallorie Zabst, Head Technician

Mallorie was born and raised in Las Vegas, NV. She started riding horses at a young age in multiple disciplines and competing in local club shows. Mallorie went to college at New Mexico State University where she was a part of the NCAA Equestrian Team riding hunt seat as well as an instructor for the NMSU Therapeutic Riding Program. She graduated in the spring of 2011 and received her bachelor’s degree in Animal Science with an emphasis in Equine Management.

Mallorie moved to the PNW after college with her husband Kyle, her huskies, and her quarter horse mare Hallie and is enjoying all the new adventures Oregon has to offer. She has been a part of the Columbia Equine team since March 2012.

Candace Howell, Technician

Candace joined Columbia Equine in 2015. Growing up with horses led Candace to develop an interest and passion for equine medicine. She pursued her interests through Oregon State’s Pre-Vet program and the Kentucky Equine Management Internship. After working in Washington as a surgical technician, Candace found her way back to Oregon.

When Candace isn’t working she can usually be found riding. She also enjoys hiking with her husband, Josh, and her lab mix, Max.

Michelle Micallef, Veterinary Assistant

Michelle is an Oregon native who joined the Columbia Equine team in 2016. She grew up riding and showing horses in the Portland area. When she is not helping out around the practice she can be found with her Quarter Horse mare Callie chasing cows and trying their hand at reining.

Katie Skyles, Groundskeeper

Katie is a student at Warner Pacific University pursuing her bachelor’s degree in Biology in hopes of continuing her education abroad in Zoology. Katie is a serious lover of dogs and horses; she has a 2 year old heeler named Charlie as well as an appendix mare and a mustang filly. She a Portland native, and in serious love with the Pacific Northwest. In the last year Katie has changed riding disciplines shifted her focus to dressage and working equitation. It keeps her and her riding mare challenged in exciting ways!