Get to know our veterinary team
We are solely dedicated to your pet’s care! We look forward to getting to know you, and we hope you’ll take the time to scroll down and get to know us.
Our Founders
Our Veterinarians & Staff
Hannah Poole, DVM
Emergency Clinician
Dr. Hannah Poole is a Florida native who graduated from the University of Florida College of Veterinary Medicine in 2018. Dr. Poole has always dreamed of becoming an emergency veterinarian, even back in elementary school, when she would insist that her older sister watch Emergency Vets on Animal Planet with her nonstop. After completing vet school, Dr. Poole moved to the Pacific Northwest and completed a rotating internship with Seattle Veterinary Specialists in 2019. Following her intern year, Dr. Poole joined a large specialty hospital and spent the next 5 years further refining her skills and strengthening her love for emergency medicine. Her favorite cases to treat include acute kidney injuries, trauma, and toxicities. She also developed a special interest in extracorporeal therapies and is a part of the extracorporeal program (dialysis, hemoperfusion, and therapeutic plasma exchange). Dr. Poole has many interests, but her favorite part of coming to work each day is connecting with families and working as a team to achieve the best possible outcome for their furry loved ones.
When not at work, Dr. Poole loves to hike, camp, travel, and enjoy live music. She has two rescue cats and a tiny lab/rottweiler/pitbull mix (who tends to have a lot of opinions).
Justina H, Assistant Practice Manager
With over a decade of experience in the emergency and specialty veterinary field, I’ve learned to embrace the chaos, adapt to the unexpected, and always make time for a quick cuddle with a furry friend. I’m proud to be part of this incredible team led by Shannan and Mitchell, whose vision and passion have truly transformed veterinary care. Working alongside them for the past ten years has been an inspiring journey, and I’m thrilled to contribute to their mission of redefining exceptional medicine.
At home, I fully embrace my role as a crazy cat lady with a minor in Rottweilers. Sharing my life with three cats and three Rottweilers means there’s never a dull moment—and plenty of personalities to keep me on my toes.
I’m deeply committed to the “why” behind what we do, always staying grounded in our mission to provide outstanding care for pets and their families. Whether it’s managing a hectic day at the hospital, finding ways to support my team, or going the extra mile for clients, I strive to bring passion, humor, and heart to everything I do.
Katie E, Practice Manager
Born and raised in California’s Central Valley, Katie Ellefson discovered her love for animals early—fostering and bottle-feeding puppies and kittens as a child before moving on to raising guide dogs for the blind at just nine years old. These experiences nurtured her deep understanding of animal behavior and sparked a lifelong passion for the incredible bond between people and their pets.
With a strong background and foundation in both human and animal communication, Katie is driven by a heartfelt desire to help clients feel informed, empowered, and supported. She’s especially passionate about supporting OGVECC’s mission to making veterinary medicine more accessible and less intimidating, always striving to connect with clients in a way that builds trust and confidence.
At home, Katie embraces life’s coziest moments with her husband, three spirited French Bulldogs, and two affectionate cats. Her favorite way to unwind? A full-on cuddle puddle of fur, snacks, and a good book or show.
Drew Allison, DVM
I enjoy skiing, mountain biking, backpacking, and traveling when I am not at work. I came to Old Growth Veterinary Emergency and Critical Care because of their goal to make veterinary care more accessible.