Dr. Greg Hassel was born and raised in Missouri. He graduated in 1983, from the University of Missouri Columbia with his Doctorate in Veterinary Medicine. Before opening Companion Animal Veterinary Clinic, he gained experience at several clinics throughout the area. His most memorable experience was working with Dr. Griffiths at Mattawan Animal Hospital. They remain good friends to this day. Dr. Hassel has one dog, Gibson, along with one cat, Spice. He spends much of his free time working on one of his many projects. He likes to visit with family in Missouri when he can. He also enjoys reading, fishing, hunting, and canoeing [citation].