Dr. Mueller received her BS in Biology and BA in Education, with honors, at Western Washington University in 1986, and her Doctor of Veterinary Medicine from Washington State University in 1990. Before becoming a veterinarian, she showed horses in 3-day eventing, and dogs in conformation and obedience, and worked in dog grooming and boarding.

Dr. Mueller brings a broad wealth of experience to Pet Health Harbour, LLC. With over 30 years of experience, she has a strong background in general small animal practice, including feline-only practice, as well as experience in emergency medicine, relief practice, and shelter medicine. Dr. Mueller was certified in Animal Chiropractic in 1995 by the American Veterinary Chiropractic Association and since 1998 has maintained a solo animal chiropractic practice, Mueller Animal Chiropractic, in Bellingham, WA.

Dr. Mueller has two primary passions in veterinary medicine. The first is to improve the quality of life of pets, largely through reducing and preventing pain. She has addressed this by providing education for pet owners and accessible veterinary services, including chiropractic. Her other passion is preventing the single most common cause of death in companion animals: euthanasia due to overpopulation. She has worked tirelessly in high-quality, high-volume, low-cost spay and neuter programs to address and prevent this problem.

Dr. Karen Mueller was born and raised in the Pacific Northwest and still lives there with her husband and their three dogs. She continues to work in Spay and Neuter programs throughout the region, as well as practice at Mueller Animal Chiropractic.