Meet Our Skilled Veterinarians

Dr. Robert Nack is a St. Louis native. He went to undergraduate school at Truman State University and received his DVM from Mizzou in 1997.

A Diplomate of the American College of Veterinary Surgeons, Dr. Anderson has extensive experience in general soft tissue, oncologic and orthopedic surgery, including total hip replacement, with a special interest in minimally invasive surgical techniques such as laparoscopy and arthroscopy.

A Diplomate of the American College of Veterinary Emergency and Critical Care, Dr. Koors has extensive experience in, but not limited to, the stabilization of severe traumas, intoxications, mechanical ventilation and pain management.

Dr. Yarnall was born and raised in the St. Louis area. He received his Doctor of Veterinary Medicine degree from the University of Missouri College of Veterinary Medicine.

Dr. Mary Jean Gorse knew at a very early age that she wanted to be a veterinarian; however, she never dreamed that she would build one of the largest veterinary referral and emergency centers in the Midwest. Dr.

Dr. Kristen O’Dell grew up in a small town in Missouri. She completed her undergraduate studies and veterinary degree at the University of Missouri in 2001.

Jill Luther is a graduate of Southwest Missouri State University who received her DVM from the University of Missouri.

Dr. Coletti joined VSS on January 15, 2009 after being selected for a small animal surgery residency.

Dr. Sherman joined VSS on May 20, 2013 as an emergency and critical care veterinarian.

Dr. Shelby Mancini is a diplomate of the American College of Veterinary Internal Medicine – Neurology.