Dr. Dennis Katzer graduated from the Iowa State veterinary program in 1981 and practiced small animal and equine medicine for two years in Longview, WA. In 1983 Dr. Katzer moved to Fairmont, MN, to work with the Fairmont Veterinary Clinic. In 1989, Dr. Katzer purchased the small animal and equine part of the practice, along with the building, from the Fairmont Veterinary Clinic and established The Chain of Lakes Pet Hospital. Dr. Katzer lives in Fairmont, Minnesota with his wife, three horses, and three cats.

Dr. Anna Arndt graduated in May of 2014 from the University of Minnesota with a Doctor's degree in Veterinary Medicine. She grew up in East Chain, MN, and is the daughter of Bernie and Julie Petrowiak. She graduated from Granada Huntley East Chain High School in 2007. She lives in Lewisville with her husband Tedd, 1 dog, and 2 cats.