Our Veterinarians

  • Dr.
    Kurt Walter- Hansen
    Owner, Veterinarian

    In 1985, Dr. Walter-Hansen bought a little house that had been built way back in 1915. After considerable remodeling, he turned it into a functioning hospital, and Shamrock Animal Hospital was born. As the clinic grew and the many pets of Rosemount came to receive care, it wasn’t long before Kurt realized they were going to need a bigger facility! They moved into their new building in 1996, where the hospital still is today.

    Dr. Hansen received both his Master’s in Animal Science and Economics and his DVM degree from the Royal Veterinary and Agricultural University in Copenhagen, Denmark. In 1981, he completed a clinical internship at Iowa State University before completing a one-year clinical residency in Field Services at the University of Minnesota in 1982. In 1990 and 1994, he completed advanced course work in orthopedic surgery at Ohio State University—this allows Dr. Hansen to better help pets hurt by trauma. He’s also one of a few practicing veterinarians in Minnesota certified to perform the advanced TPLO (Tibial Plateau Leveling Osteotomy) and TTA (Tibial Tuberosity Advancement) surgeries. In addition, Dr. Walter-Hansen serves as an Adjunct Instructor at the University of Minnesota’s College of Veterinary Medicine!

    Outside of veterinary medicine, Kurt is a self-proclaimed “project magnet.” He often works on building construction and other challenging endeavors. He also enjoys traveling with his wife, working on his country farm with a menagerie of animals, and spending time with his children and grandchildren.

  • Dr.
    Patricia A. Walter
    Owner, Radiologist

    Like her husband and partner in ownership, Dr. Patricia Walter received her DVM degree from the Royal Danish Veterinary and Agricultural University in Copenhagen, Denmark. After graduating, she owned her own small-animal practice in Copenhagen while also working in the radiology department at the University. She was board-certified by the American College of Veterinary Radiology in 1984 after completing a clinical residency and a Master’s degree in radiology at the University of Minnesota’s College of Veterinary Medicine. She was even a faculty member at the University from 1985-2003, during which time Shamrock Animal Hospital was founded!

    Patricia has a special interest in abdominal ultrasonography and pulmonary radiography, and has contributed many scientific articles and textbook chapters to veterinary literature. Currently, she owns Veterinary Diagnostic Imaging, Inc., which provides continuing education, telemedicine, and referral ultrasound services to other veterinary practices.

    Dr. Walter lives with her husband on a farmstead in Rosemount, where they share their lives with three rowdy terriers, three mischievous cats, and three comfortably retired horses. When time allows, Patricia enjoys traveling with her husband, gardening, searching for antiques, and spending time with her two energetic granddaughters.

  • Dr.
    Julie Gauthier

    Dr. Gauthier grew up in Fairbanks, Alaska, and obtained my bachelors in biology at the University of Alaska. She then moved to the Twin Cities and went to the U of M’s College of Veterinary Medicine, where she earned my DVM degree in 1992. She met my husband in 1995, and we welcomed her son in 2002. She have one dog, a Husky named Willow, and an orange tabby cat that came to her at age 6 with the name Buster.

    Dr. Gauthier joined the wonderful team at Shamrock in February 2021. The most enjoyable parts of veterinary medicine for her are working with our team to educate people about how best to care for their pets’ health needs, doing surgery, and seeing happy pets, especially when I know we’ve done our part to keep or make them happy and healthy.

    My favorite free time activities over the years have been acting, stand-up comedy, singing, and improv. I also enjoy spending time with my family, reading, and container gardening.

  • Dr.
    Hannah Moua

    Introducing our newest doctor, Hannah Moua, DVM! 

    Shamrock Animal Hospital is pleased to welcome Dr. Moua to the team as one of our veterinarians. Dr. Moua is a 2021 graduate of Iowa State University’s College of Veterinary Medicine and received her undergraduate degree in biology from the University of Northwestern St. Paul in 2015. She has worked in a wide variety of settings such as anesthesiology, shelter medicine, wildlife rehabilitation, research, and small animal general practice. She is especially passionate about pocket pets - small exotic mammals such as rabbits, guinea pigs, and rodents -  as well as preventative/wellness medicine and client education. Additionally, she is Fear Free certified, meaning she has completed training to employ methods that help reduce anxiety in pets during veterinary visits. 

    Dr. Moua has always loved all animals, but it was her first rabbit, Humphrey - a toothless, deaf Holland lop with one good eye - that made her fall in love with rabbits and pocket pet medicine. Currently, she and her husband share their home with two rabbits (Sumo, pictured here), and a mustached British shorthair cat, Groucho Marx. When she’s not working or caring for her pets, Dr. Moua spends her time hiking, traveling, reading, or being in prayer and worship with her small church family.  

    Her favorite part about veterinary medicine is helping animals and the people who love them. 

    “The human-animal bond is so amazing. People are so connected with their animals, so by treating animals, I get to build relationships with both patients and clients and see mental and physical healing.” 

    Dr. Moua looks forward to caring for all of your cats, dogs, and other furry family members at Shamrock Animal Hospital! 

  • Dr. Raeyna Modrow-Longtin

    Dr. Longtin grew up just outside Cedar Rapids, Iowa, but her family spent summers at their cabin near Brainerd, and she always knew she wanted to live in Minnesota. She obtained her Bachelor of Arts degree (and her husband, Shane) at Illinois Wesleyan University. She attended veterinary school at the University of Minnesota and graduated in 1996. Since that time, she has practiced in a variety of practice settings, most recently spending 12 years doing in-home visits with the housecall practice that she started and grew. 


    Dr. Longtin is certified in Fear Free handling, and is passionate about making your pet's veterinary experience as low stress as possible. She loves being a part of the bond between people and their pets and enjoys mentoring and encouraging team members. 


    In addition to her husband, Dr. Longtin has two adult children, Jordan and Michael. Her 'empty nest' is still fairly full with her standard poodle, Percy, golden retriever, Bubbles, a small herd of cats, and a cowardly ball python named Rodney Dangernoodle. When she isn't working, she enjoys a variety of crafts and tinkering with her vintage VOlkswagen Beetle, Winifred.