Dr. John Arnold was born in Seal Beach California and has practiced as a veterinarian in Nevada, California, Oregon, and Colorado. John is a proud CSU Ram, he attended Colorado State University for his BS in Zoology, MBA, and DVM. While attending the CSU School of Veterinary Medicine he met his future wife who is now a Board Certified Veterinary Surgeon and Surgical Oncology Fellow. Both Dr. Arnold and his wife graduated with the class of 2006.

John’s proudest accomplishment is being a father to his daughter Rylee Rose, who was born in May of 2015 and is quickly turning out to be an avid rock climber and hiker like her dad. In addition to enjoying rock climbing and hiking with his family and border collie mix, Lucy, he also enjoys playing ice hockey, soccer, and traveling. Dr. Arnold first joined the Raintree family in 2008 and in addition to practicing traditional veterinary medicine is also AAVMA Certified in Veterinary Acupuncture.

Some of his professional interests include cancer management, pain management, surgery, anesthesia, dermatology, and strengthening the human-animal bond. You may see John climbing or biking around Horsetooth or up Poudre Canyon… or enjoying his favorite meal (Brunch) with his daughter downtown. John is still actively involved at CSU. He serves on the Curriculum Committee for the CSU Doctor of Veterinary Medicine program. You may see him on campus giving presentations to the Pre-vet club or meeting with graduate students on what life is like as a practicing veterinarian. John also started a mentoring program at Raintree that gives future veterinarians an idea of what life is like at the hospital.

Dr. Sara Sheltren grew up in Southern California and earned her Bachelor of Science degree from the University of California, Santa Barbara. She then moved to the island of St. Kitts, West Indies, where she would experience many amazing adventures while attending Ross University, School of Veterinary Medicine. After completing clinical rotations at Oregon State University, she earned her DVM degree in 2009. In addition, Dr. Sheltren’s interest in alternative medicine led her to complete her acupuncture certification from IVAS in 2012. After practicing in the beautiful Pacific Northwest for many years, she moved on to her next adventure in Fort Collins after her son was born. She joined the Raintree family in 2018. Her special areas of interest include soft tissue surgery, acupuncture, internal medicine, and pain management. She also earned her Fear Free Certification in 2018 and is excited to use these skills to decrease stress for her patients as well as strengthen the human-animal bond.

In her free time, Sara enjoys spending time with her husband, son, two dogs, and two cats and exploring all that the beautiful state of Colorado has to offer!

Upon graduation, she remained in Fort Collins where she met her husband, Steve, worked as a veterinary technician and continued on to attend veterinary school at Colorado State University. Dr. Holwegner has worked in small animal private practices in northern Colorado and Thornton prior to joining the Raintree team. Her interests include internal medicine, diagnostic imaging, and the human-animal bond.

Blair and her husband share their home with their dog Evie, their cat Griz, and their parakeet Charlie. She enjoys singing, gardening, being outdoors, and is an avid bird watcher.

Susan was born and raised in the northwest suburbs of Chicago. In the summer of ’97, she moved to the wonderful state of Colorado to attend Colorado State University. In 2001, she graduated with a BS in Wildlife Biology. Susan wanted to broaden her animal education, so she completed the Veterinary Technician Program at Front Range Community College and in 2004 become a certified veterinary technician. Since then she has had the pleasure of working at Colorado State University Veterinary Teaching Hospital in various small animal services, such as Community Practice, Internal Medicine, and Dentistry and Oral Surgery.

In July 2013, she joined the RAH team as practice manager. Outside of work Susan stays busy with her family, loves to dabble with photography, gardening, and enjoys every opportunity she gets going to the mountains.

Sarah was born and raised in Denver Colorado. She moved to Fort Collins in 2000 to attend Colorado State University. In 2005 she graduated with a bachelor’s degree in Biology and in Animal Sciences. She joined the Raintree staff in January 2006. Outside of work she enjoys spending time with her husband Ryan and sons Brendan and Ryder. She also enjoys sewing, reading, playing music, hiking, and 4-wheeling in the mountains.

Natalie was born and raised in Wheat Ridge, Colorado. After graduating high school in 2002 she moved to Fort Collins to attend Colorado State University. She graduated in 2007 with a double major in Biology and Zoology and later joined the RAH team in October 2008. In her spare time, she loves to read, study the Bible, and hang out with her friends and roommates. Her hopes are to one day be a wife and mother and to learn to love God more with each day she is given.

Jaime graduated from Front Range Community College in 2012 with a Veterinary Tech Assistant Certificate and loves working here at Raintree Animal Hospital. Aside from helping clients and loving on the patients, Jaime truly enjoys obsessively cleaning everything and unpacking the weekly order. Outside of work, you’ll find Jaime hanging out with her family and friends, singing in the car, or taking a little mid-day snooze on the couch. She shares her house with her sister Jessie, three dogs (Princess Adelaide Victoria Peach III, Louie, and Dylan), two cats (Bella and Buttonlicious), and two rats (Beethoven and Socrates).

Jessi is finishing up her undergraduate at CSU and getting a bachelor’s degree in both Biology and History. She is an aspiring veterinarian and loves to constantly learn, especially in the medical field, which is why she loves her job as a veterinary assistant and working with patients at Raintree. In her free time, Jessi loves to hike with her two dogs and husband, read, and horseback ride. She is part of a group called Knights of the Tempest where she does medieval horseback riding and even jousts!