About Us

About Our Practice
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Since 1956

Our History

Yorkshire Animal Hospital, established in 1956 by Dr. Harry “Cap” Eschenroeder, has served the pet owners of the Affton/Crestwood/Webster Groves communities for 37 years. After several different associates entering and leaving the practice, Dr. Diesel joined the practice in October 1992.

Dr. Diesel became the practice owner on July 1, 1993. Currently, Dr. Diesel works as the sole veterinarian and employs four veterinary technicians, a veterinary assistant, a groomer, and a receptionist. He is looking forward to the day when he can employ a second veterinarian that will allow the practice to offer increased services and allow Dr. Diesel more time for his family.

Years In Practice

Dedicated Clinicians

Animal Rescues Supported

What Drives Us

Our Mission

Our mission is to practice the highest quality medicine & surgery with compassion and an emphasis on client education.  Our entire healthcare team is committed to providing personal attention to the unique concerns of each individual pet owner.

Our Services

Links for Patients

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Our Team

Meet Us

Dr. Dale Diesel


Dr. Dale R. Diesel graduated from the University of Missouri College of Veterinary Medicine in 1981.  After graduation, he joined a six-doctor practice in Breese, Illinois where he cared for the companion animals of the practice plus made farm calls to the numerous dairy & swine farms in the area. In 1986, he left practice to work for Purina Mills, Inc., where his responsibilities included product development and technical support for Animal Health Products.

Dr. Diesel joined Yorkshire Animal Hospital in October 1992, then purchased the practice in July 1993.  The most gratifying experience a veterinarian can have is to watch successive generations of family members trust him with the care of their four-legged family members.

He enjoys the beauty of nature & wild life.  Sasha & Cali, two of his three dogs, enjoy spending time on the couch more than outdoors.  While Jax, a Labrador Retriever, enjoys hunting and fishing with him.  Dr. Diesel relaxes by spending time with family & friends & working on his property in Southern Illinois.

Dr. Shannon McCollough


Dr. McCollough received her Doctorate in Veterinary Medicine from Colorado State University in 1990. After graduating, she did an accredited internship with Sacramento Animal Medical Group. She is a member of the following professional organizations: AVMA, MVMA, & Greater St. Louis Veterinary Medical Association, where she was involved in leadership, including a year as the organization’s President. Dr. McCollough’s favorite part of the job is developing relationships with clients an their pets. She and her husband (Mark) have a son (Luke), they have three dogs: Porsche Cayenne, Mini Cooper, Galloway; and two cats: Lamborghini Murcielago, and Ferrari Testarossa. In her free time she enjoys traveling the world, photography , and reading (anything and everything!) in addition to working on the family’s business teaching entrepreneurship in rural South Africa.


Practice Manager/Veterinary Technician

Graduated from Bishop Duburg High School in 1990 and Jefferson College in 1993 with an Associates of Applied Science in Veterinary Technology.  She came to orkshire Animal Hospital in 1991 with Dr. Eschenroeder still owned and operated the clinic.  She was here before Dr. Diesel came to assist with the practice in 1992, and helped him with thte client transitions when he bought the practice in 1993.  Amy married her grad school/high school sweetheart, William, in December 1995 and they welcomed a beautiful daughter, Alexis, in November 1996.  She has lost a few dogs and cats over the years, but now she still has a few cats & her Great Dane, Izzy, born June 29, 2010.


Pet Stylist

Went to Riverview Gardens High School and graduated from Petropolis School of Grooming in 1998.  She came to Yorkshire Animal Hospital in April 1998 and started as a bather only.  Since that time she has become the only groomer and continues to beautify her patients.  She enjoys traveling The United States to relax.  She has cats, Luke & Leia.


Registered Veterinary Technician

 Graduated from Oakville Senior High School in 1998 and Jefferson College in 2001 with an Associates of Applied Science in Veterinary Technology.  May 2000 she started at Yorkshire Animal Hospital to do an internship while going to school.  She also worked at Animal Emergency Clinic in Collinsville in 2001.  June of that same year she received her Certification to become a Registered Technician for the state of Missouri.  Ultimately she left emergency medicine after 9/11 to stay in a small owned practice to grow with the clientele. She currently has a Rottweiler, Sylvester, born January 24, 2012 & a Labroador, Dutch, born July 16, 2018.


Veterinary Technician

Graduated from Oakville Senior High School