Our Doctors

Dr. Richard Schwahn, DVM, Owner

Dr. Schwahn joined the practice in 1999 and became a partner/owner in 2001. He took over full ownership in 2011, and in recognition of this new chapter in the life of the practice, changed the name to Altitude Veterinary Hospital, in the fall of 2012. The name is a reflection of the higher level of care that Dr Schwahn and his team strive to provide each day.

The team at Altitude values continuing education and trainings, to better provide the services sought after by our community. Dr. Schwahn’s special interests include TPLO’s (Tibial Plateau Leveling Osteotomy) for cruciate tears, fracture repairs, and pain management. He is an active member of the Rotary Club of Casper, and volunteers on Rotary’s Youth Exchange Committee.

Dr. Schwahn and his wife Michelle have two children, a daughter-in-law, and a spunky grandaughter, along with 8 host children from around the world that they enjoy immensely. Born and raised in Lincoln, Nebraska, Dr. Schwahn is a fan of all things Husker, especially football. Other favorite activities include yoga, home brewing, golf, and spending time with family and friends, including his two furry friends, Molly and Mathilde.

Dr. Tangney Gray-Dockham, DVM, Owner

Dr. Gray’s career with Altitude Veterinary Hospital began as a teen, when she worked as a volunteer and veterinary assistant at the practice. She joined our team as a Doctor in 2010 after obtaining her veterinary degree from Colorado State University, and in 2013 she became part owner of the practice. Her veterinary interests are extensive, but she enjoys internal medicine and surgery. She enjoys putting cases together and solving difficult problems, the more complex the problem, the more intriguing. She enjoys the relationship clients have with their pets and the ability to help foster this bond.

Dr Gray is a Casper native, attending NCHS and Casper College. She is married to her high school sweetheart and they have two daughters. Her family has a home west of town that is shared by three dogs, two cats, two parrots, and two horses. Her life outside of work is full of activities for the kids, although they are still young, they are very busy. She enjoys group fitness classes, hiking, floating the river, and camping.

Dr. Angela Bell, DVM, Associate

Dr. Angela Bell was raised in Larkspur, CO, with her six siblings. Her passion and devotion to animals and their well-being inspired her to become a veterinarian. She completed her bachelor’s degree from Brigham Young University-Idaho, her Doctorate of Veterinary Medicine from Ross University School of Medicine, and her clinical year at Kansas State University in 2012.

Angela enjoys serving the community both professionally and personally through her work and in her free time, currently serving as President of the Wyoming Veterinary Medical Association (WVMA) and as a spokesman for the veterinary profession throughout the State of Wyoming.

Angela is dedicated to her profession and continuing her education. She recently completed an advanced dental training course from Animal Dental Care and Oral Surgery Specialists in Colorado Springs, CO, and has also completed courses in oncology, chronic kidney disease, ophthalmology, wildlife and is Fear Free Certified.

Outside of her practice, Angela enjoys spending time outdoors with family and traveling. Angela enjoys being with her four rescue animals and a loving husband who shares her passion for Wyoming. Her dedication to animals has been a driving force for service and excellence in her career and will continue to provide deep meaning in her life.

Dr. Sarah Schoonover, DVM, Associate

Dr. Schoonover grew up in Gillette, WY, and attended the University of Wyoming for her undergraduate education. There she played on the Women’s Rugby Team for 3 years. She attended Washington State University College of Veterinary Medicine to receive her doctorate.

Sarah has been practicing in Casper since she graduated in 2013. She enjoys working with all types of companion animals but has a passion for exotic pets including reptiles. Sarah is a certified Fear Free practitioner who also has completed training in oral and periodontal surgery and pain management courses. She currently is pursuing further training in abdominal ultrasonography.

Sarah enjoys mountain biking, yoga, and pottery. Sarah and her husband Ryan have two children Silas and Layla who enjoy getting outside and up on Casper Mountain. She has two dogs Hattie and Rudy, and recently adopted an iguana named Moose.

Dr. Nika Martin, DVM, Associate

Dr Nika Martin joined the team at Altitude Veterinary Hospital after completing her DVM at Washington State University in 2020. She was raised in Cheyenne, and couldn’t wait to get back to the wonderful state of Wyoming after being away for four years. Sun, snow, and mountains is all she ever wanted!

Dr Martin enjoys volunteering and serving those less fortunate. Throughout her schooling she spent time providing free medical and surgical care to pets in need at shelters, Indian reservations, and in Ecuador. Dr Martin is excited for the next volunteer opportunity to knock at her door.

Dr Martin enjoys the human animal bond and loves that she can help strengthen that bond everyday through her work at Altitude. She became Fear Free certified to help animals and owners feel less stressed when seeking veterinary services.

When free time allows, Dr Martin enjoys spending time outdoors. She enjoys hiking, camping, water skiing, and exploring the wonderful state of Wyoming with her boyfriend.