Our Doctors

Dr. Mark Miller
drmiller Dr. Mark Miller is a 1994 graduate from the Michigan State College of Veterinary Medicine. He also received his Bachelor of Science from State. Dr. Miller has worked at Grand Blanc Veterinary Hospital since 1997 and became the owner in 2007. He has been a resident of Fenton almost his entire life and graduated from Lake Fenton High School. His home is full of the usual creatures: a dog, cat, guinea pig, fish, frogs and a turtle. When Dr. Miller is not a work he is usually standing in an ice rink watching either his son Connor, or his daughter Samantha, play hockey. When time permits you might find him at the golf course where he realizes he better stick to veterinary medicine.


Dr. Eric Keilen
drkeilen Dr. Keilen attended Michigan State University as an undergraduate and went on to graduate from the College of Veterinary Medicine with honors in 2003. His time at MSU helped him become an ardent Spartan fan. After briefly working in the large animal research field, he joined the staff of Grand Blanc Veterinary Hospital to practice companion animal medicine as he thought that helping happy dogs and purring cats would help his career last longer than dodging angry bulls. This has mostly been true even if he does have a few scars that suggest that not all patients are ex cited about going to the veterinarian’s office.Being born in Arizona and having grown up in northern Michigan, Dr. Keilen has a great love of the outdoors. His many outdoor interests include fly fishing, biking, kayaking, and cross country skiing. Outside of work he spends much of his time chasing after his two young sons and sharing in their many school and sports activities. He is active in the youth education program in his church. Dr. Keilen lives with two rescued cats that allow him to share a home with them (as long as they don’t have to wait too long on meals) and an aquarium of friendly fish.



Dr. Simon Fick
drfick Dr. Simon Fick was born and raised in northern Illinois to a Navy dad and a Taiwanese mom and is the oldest of their three children. He graduated from the University of Illinois Urbana-Champaign in 1998. In addition to Michigan, he has also practiced in Illinois and Colorado. He has worked in emergency clinics, wildlife rehabilitation centers, and did graduate studies in veterinary and environmental toxicology. Dr. Fick has also helped teach the Veterinary Technician program at Baker College and has worked as an independent contractor for Pfizer Animal Health for several years. He and his wife, Jessica, have lived in Michigan now for about ten years and currently have two Pembroke Welsh Corgis named Pollux and Kiyomi whose main purposes in life are to eat and shed clumps of fur, a stinky but privileged little guinea pig named Sir William Wallace, and two smug American Quarter Horses, Sam and Pepper. Dr. Fick is an avid reader and also likes to go skiing, biking, fishing and camping and loves movie trivia!Fun Fact: Dr. Fick has sat in Sheldon’s spot!


 Dr. Kathrine O’Connor
 Dr. O’Connor attended Michigan State University where she earned her Bachelor’s of Veterinary Science in 2010 and then her Doctorate of Veterinary Medicine in 2014. She has been working with the GVBH team since December 2015. She has 2 cats (Sydney and Rafiki) at home. She also has horses, chickens and bees. She loves to horseback ride, garden and beekeeping.


Dr. Ron Crow
Dr. Crow attended Michigan State University where he earned his Bachelor’s of Veterinary Science and then his Doctorate of Veterinary Medicine in 1993. He stared working with us in March 2016. His pets at home are Ninja a chihuahua, Butch a Shih Tzu and Speck a mixed breed. He enjoys wild life/mural painting, hunting and fishing, tournament archery and motorcycle riding.