Who We Are

We are a small, private/family-owned veterinary clinic with a focus and dedication to creating and maintaining a close, accessible and familial relationship with you and your pet.

Our History

Practice owners and brothers, Aaron and Ira McCauley, both graduated from University of Missouri veterinary school. After working at various veterinary clinics in Missouri, they purchased New Melle Animal Hospital in the Defiance, MO area in 2000.  In 2001, sister clinic, McCauley Animal Clinic, was opened in Weldon Spring off Highway 94.  New construction began March 2016, and the clinic is now relocated to 4646 Mid Rivers Mall Drive in Cottleville.  We enjoy providing veterinary services to clients in Cottleville, St. Peters, Weldon Spring, O'Fallon, Harvester, Wentzville, Chesterfield and other surrounding cities.
What Our Clients Are Saying
"Everyone is always helpful and friendly. Dr Mike is wonderful. He's very understanding, doesn't rush us, and always helps us find solutions for our pets' issues."  Kathy
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"I have been taking our dog to McCauley for 6 years. Every time we visit the staff is so friendly and makes you feel like your dog is best! Dr. Cutt is awesome and very straight forward with her recommendations. Highly recommend this vet clinic."  Julie

"The staff have always treated our pets with great care and compassion. Any treatments are thoroughly and carefully explained."  Nancy

"Best animal clinic/hospital I've ever been to! The staff get to know us and our pets! They act like a doctor and a friend when needing to face a tough decision about our pets. They hug us when we are scared and sad. They are just great people! " Elizabeth and Lowell

"After all these years you guys are like an extension to our family. Thanks for all you do for us!!!"  John

"The staff took my concerns about my dog seriously and worked her in even though the schedule was full for the day. Dr Hoffman examined her, and called me two times to discuss her care and his findings. I could not ask for a better vet or staff."  Kathy

"They are always there when we need them....that means a lot because taking your pet to the vet isn't always a pleasant experience. They are very compassionate and know when you just need a hug."  Eve

"I always feel like I can really trust the staff at McCauley. They've never recommended anything my pets didn't need!"  Megan​

"We have been bringing our pets to McCauley for several years. Each time we feel like we are receiving one-on-one personalized service and care for our pet(s). The entire staff is professional, considerate and knowledgeable."  Rich and Myra


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Two sweet babies--client Stella and her pup, "Peekaboo"