Dr. Rachel Mack – Veterinarian

Dr. Mack started working here in January of 2017. Her family recently moved back to Charles City, where she is eager to build relationships with people and their pets! Dr. Mack has always been interested in helping animals. When she was younger, she dreamed of becoming a veterinarian because of a desire to learn how to help animals who could not help themselves, while helping the people that care for them so dearly.

She considers herself lucky to have bonded with many animals throughout her life. They have all heaped to nurture Dr. Mack’s drive to care for animals and advocate for them.

Her path to becoming a veterinarian started with graduating from Charles City Community High School. After this, she moved to Kirksville, MO where she attended Truman State University. Dr. Mack graduated from undergrad with a major in Biology and a minor in Agricultural Science (with a focus on Animal Science).

It was then time to move to Ames, IA to start the long journey of Vet School at Iowa State University. This huge milestone was accomplished in May of 2006! Right after graduation, she started working at a clinic in Ames where she stayed for 9 years. It was sad to leave that clinic, but her husband’s job took them to the Twin Cities for a year. Finally, her travels brought Dr. Mack and her family here to Charles City! We are so happy she is back where the journey all started!

Dr. Mack has a particular interest in dermatology issues and behavioral issues. She finds it very rewarding when one of these problems can be solved. Many of these issues need on-going care, and she enjoys working so closely with pets and their people.

Part of a full household, Dr. Mack has dogs, cats, and kids! There is never a dull moment in her house. She enjoys being around the water (swimming, skiing, boating), reading, baking, walking and most importantly spending time with her family.

Dr. Holly Neuberger – Veterinarian

Dr. Neuberger grew up in Clear Lake where she resides to this day. She lives on an acreage with her husband, Spencer; 1-year-old daughter, Violet; a hound-mix named Huck, and a Goldendoodle named Finn. She earned degrees at University of Northern Iowa and Iowa State University, graduating in 2018.

Dr. Neuberger’s interests include endocrine diseases, such as Cushing’s Disease, Hyperthyroidism in cats, and Hypothyroidism in dogs, as well as Diabetes Mellitus. She enjoys the investigation that goes into diagnosing these diseases, as well as establishing the best treatment for each individual patient. She also realizes the importance of the human-animal bond and strives to make every visit as stress-free and straightforward as possible.

On her downtime, Dr. Neuberger enjoys playing outside with her dogs and daughter, riding in the tractor with her husband during planting and harvest, and spending time with her extended family, who all live within a few miles of her home.

Dr. Neuberger started at Avenue of the Saints Animal Hospital in January of 2020 and is very excited to be working in an AAHA accredited facility where she has more access to advanced diagnostics.

Dr. Jami Mallen – Associate Veterinarian

It makes perfect sense that Jami would become a veterinarian—after all, she quite literally grew up in the clinic! Her mother, Dr. Phyllis Frost, is the owner of Avenue of the Saints Animal Hospital. Upon graduation from veterinary school, Dr. Mallen easily transitioned into a position right alongside her mother.

Jami grew up a few miles outside of Plainfield, Iowa. She started her veterinary career as a Technician here at Avenue of the Saints Animal Hospital in 2007, gaining valuable experience for veterinary school. She completed her undergraduate studies at Wartburg College, majoring in Biology, before getting her DVM degree from Iowa State University’s College of Veterinary Medicine.Dr. Mallen has a special passion for internal medicine and loves the problem-solving approach it requires. She also loves doing new patient exams, helping a pet owner to transition their furry friend into the home seamlessly. Jami is married to her wonderful husband, John, who works as a Regional President for Woodruff Construction. They have two beautiful and energetic daughters, Harper and Addyson. Together, they have three cats, Carson, Ace, and Dice. Outside of her veterinary interests, Dr. Mallen loves to stay active by running 5ks, triathlons, mud runs, and marathons. She also enjoys do-it-yourself projects around the home, especially when she’s able to turn an old, tattered item into something beautiful. Jami also likes to read and quilt when she gets the chance.

Dr. Phyllis Frost – Owner, Veterinarian

Growing up on a dairy farm near Plainfield, Iowa, Dr. Phyllis Frost was surrounded by animals from an early age. In addition to the cattle, horses, hogs, chickens, dogs, and cats that she regularly spent time with, she would also bring home plenty of wild animals to save! As she got older, Phyllis realized that a career in animal care was the only path for her.

Dr. Frost first attended a Veterinary Technology program at Northeast Missouri State University, graduating in 1980. She worked as a Certified Veterinary Technician for eight years, then got the itch to own her own practice. She returned to school at Wartburg College, graduating with a Bachelor’s degree in Biology in 1990. From there, Phyllis was accepted into Iowa State University’s College of Veterinary Medicine, earning her degree with top honors in 1994 and opening Avenue of the Saints Animal Hospital shortly thereafter.Dr. Frost has three children. Dr. Jami Mallen is also a veterinarian and works alongside her mother right here at the clinic. Dr. Frost’s son, Jacob, currently serves in Ramstein, Germany, as a member of the Air Force. Phyllis’s youngest daughter, Jordan, is still in elementary school. Together, they share their home with five Shetland sheepdogs, two indoor Cornish Rex cats, two barn cats, a gerbil named Ariel, and a green-cheeked Conure named Jasmine. They also have two-quarter horses, a paint stallion, an Appaloosa, a mustang from the Wyoming open range, and a miniature horse named Bayberry. In her spare time, Dr. Frost likes showing her Shelties at AKC shows and showing her paint horse in performance or Western pleasure classes. She’s also completed two marathons and multiple triathlons!