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Hours of Operation

Monday – Friday

8:30 – 5:30


8:30 – 12:30

Emergency calls are answered 24 hours a day.

Equus Veterinary Service, P.C.
14671 South Leland Road
Oregon City, OR 97045
(503) 632-2100 Phone
(503) 632-2112 Fax

The Equus Veterinary Service Doctors


Steve D. Sundholm, DVMDr. Sundholm's interest in veterinary medicine developed as he was growing up in Iowa. An avid horse lover since childhood, Dr. Sundholm trained his own horses and was accomplished in barrel racing and pole bending. After graduating from the Iowa State University College of Veterinary Medicine in 1978, Dr. Sundholm practiced equine and small animal medicine in his hometown for five years. Since 1983, he has been an equine exclusive practitioner in the Oregon City area. A past president of the Northwest Equine Practitioners Association (NEPA), Dr. Sundholm maintains memberships in several professional associations including AAEP, AVMA, OVMA, NEPA, and the International Association of Equine Dentistry (IAED). Dr. Sundholm has taken many extra courses in equine dentistry to supplement his education and enjoys helping horses with their dental equilibration needs. He passed all levels of certification in the IAED and served as an examiner for this organization, administering dental certification testing for other practitioners across the country. Dr. Sundholm is excited about all aspects of equine veterinary medicine, especially surgery, reproduction, lameness and dentistry. Instrumental in the design and building of the new clinic, Dr. Sundholm welcomes the opportunities for enhanced client services. In his spare time, Dr. Sundholm enjoys bird hunting with his dogs, ballroom dancing, a variety of outdoor recreational activities, and power tools.



Dr. Holme was born and raised in the farming community of Winters, California. His interest in horses and livestock began on his father’s small Texas farm where he spent summers riding horses. A lifelong interest in animals and agriculture led him to an undergraduate degree in agriculture from Chico State University in 1997 and a degree in veterinary medicine from University of California Davis in 2003. Dr. Holme worked as a large animal practitioner in northern California until 2015 when he and his family moved to the Oregon City area. In his former practice, Dr. Holme had experience with a variety of large animal species, but horses have been his focus. Particular areas of interest include equine dentistry and reproduction. Dr. Holme is a member of AAEP, AVMA, OVMA, and NEPA. Dr. Holme enjoys camping and exploring the outdoors with his wife and two boys. When time allows, he also enjoys hunting and fishing.



Ashley A. Magee, DVM, DACVSOriginally from the West Linn area, Dr. Magee earned her undergraduate degree from the University of Oregon in 1986 before pursuing her veterinary degree at Tufts University where she graduated in 1995. After completing an internship in large animal medicine and surgery at Washington State University in 1996, Dr. Magee went on to a surgical residency program at University of California Davis, which she finished in 1999. Since earning her board certification by the American College of Veterinary Surgeons in 2000, Dr. Magee has performed surgery in equine hospitals here in Oregon and as a visiting faculty surgeon for Washington State University and provided mobile equine surgical services for several equine hospitals in the region. Currently Dr. Magee is a staff surgeon for Dove Lewis Emergency Animal Hospital and also performs elective surgical procedures here at Equus Veterinary Service. Dr. Magee is a member of PVMA, OVMA, AVMA, ACVS, VECCS, AAEP and the Society of Phi Zeta. Outside of work, Dr. Magee enjoys horseback riding, traveling, hiking and other adventures with her husband and twin girls.

Support Staff

KAREN FROGNER, CVTKAREN FROGNER, CVT, assists the doctors at Equus in a wide variety of diagnostic, medical, and surgical procedures. With a special interest in equine anesthesia and radiography, Karen has several years of prior combined experience at an equine referral center and an equine lameness specialty clinic plus six years as a small animal veterinary assistant. An avid endurance rider, gaited horse trainer, and long-term horse owner, Karen says, "Riding is like breathing."

ANITA KNAPPANITA KNAPP had a seventeen-year history of veterinary technician experience in California before moving to Oregon in the 1990’s. Her background also includes several years’ work at a guest ranch, as well as significant office experience. Anita brings a life-long love of horses to her job as a receptionist and veterinary assistant at Equus and lives for camping with her Quarter Horses.

ANITA KNAPPRACHAEL STEFFEN had many years of horse experience before starting at Equus as a veterinary assistant.  She participated in 4-H, trained and showed horses, gave riding lessons, and worked as a wrangler at summer horse camps.  Rachael loves the outdoors, especially if it involves horses.  In her spare time, Rachael enjoys reading equine veterinary books and spending time with her horse “Mica.”

SHIRLEY KOHLERSHIRLEY KOHLER, a dedicated Equus employee since 1995, has experienced many changes and considerable growth in the practice over the years, advancing to reception and billing department supervisor. Shirley’s horse experience includes the operation of her own boarding facility for more than 20 years. During that time, she also held various 4-H leadership positions, including several years as 4-H Horse Advisory Chair. In her spare time, Shirley enjoys trail riding.

VICKI WEEDVICKI WEED has enjoyed her work as receptionist at Equus since 1996. Vicki’s first horse, given to her before she could walk, was her constant companion as a child. Her love of horses and desire to work with people provide her with inspiration to continue learning about horse care in order to provide excellent client service.

ANGELA SUNDHOLMANGELA SUNDHOLM, a former high school math teacher, manages the business aspects of the veterinary practice. Angela has fond memories of her pony Sassy, husband Steve’s POA Skeeter, and a crazy horse show event called the "panty race." Angela assisted in the design and building of the new clinic and is excited about the expansion in client services.


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Equus Veterinary Service, P.C. | 14671 S. Leland Rd. | Oregon City, OR 97045

Emergency calls are answered 24 hour a day. | Phone (503) 632-2100 | Fax (503) 632-2112