Dr. Harvey D. Shaffer
A native of eastern Colorado, Dr. Shafffer received his Doctorate of Veterinary Medicine in 1973 from Colorado State University. Upon graduation, he was accepted at Oklahoma State University to do a year internship in small animal medicine and surgery. In 1978, Dr. Shaffer opened his own small animal practice in Longmont, Colorado where he provided exceptional small animal care to his beloved four-legged friends. In his spare time, he enjoys playing frisbee with his dog Moki and spending time with his family going camping, horseback riding, reading, and photography.
Dr. Annie Lorenzen
Dr. Annie Lorenzen was raised in North Carolina and attended UNC-Chapel Hill for her undergraduate degree. After spending time working with wildlife in Africa, she received her Master’s in Public Health and Doctorate in Veterinary Medicine from The Ohio State University. Dr. Lorenzen then joined a small-animal hybrid specialty practice in Denver and focused her training and development on soft tissue surgery. She has spent the last 7 years performing laparoscopic, emergency, and other soft tissue procedures. With nearly 1,000 laparoscopic procedures performed, she remains most passionate about emergency surgeries. When Dr. Lorenzen is not scrubbed in, she enjoys spending time with her husband, young son, and two Labradors, as well as running, snowboarding, and hiking.
Dr. Isla Arcaro
Dr. Isla Arcaro, a board-certified veterinary anesthesiologist.
Becoming a veterinarian has been her dream since I was nine years old, but the journey here wasn’t always smooth. I started in the industry as a kennel assistant, working my way up to veterinary technician and eventually ICU supervisor. Each step taught me something new about patient care and the dedication it takes to help animals in need. But it wasn’t until I decided to return to veterinary school that my path truly began to take shape.
During my internship, I discovered my passion for anesthesia—it was impossible to miss, as my mentor pointed out: “Every time you talk about anesthesia, your face lights up.” That passion only grew as I completed my residency in Anesthesia and Analgesia at the University of Illinois and gained hands-on experience at a busy referral hospital in Pittsburgh.
Now, with over a decade of experience spanning specialty practices, academia, and general veterinary hospitals, I’ve developed a collaborative, real-world approach to anesthesia care. But one issue continues to motivate me: the rising cost of veterinary care. Specialty services, while vital, can often be out of reach for many clients. I believe every patient deserves access to high-quality care, regardless of where they are or what they can afford.
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