Lange Animal Clinic

Relevant Marketing LLC



At Lange Animal Clinic, we are dedicated to providing excellent veterinary care and always exceed our clients' expectations.

Request Appointment

Request your next appointment using our quick and easy to use online form. One of our specially trained associates will call to confirm your appointment.

Client Login


Manage your pet's health schedules, view upcoming recommended treatments, refill prescriptions, & have 24/7 access to medical records.

Pet Owner Resources

Access useful information and helpful resources to help you provide the best care possible for your pets.

Clinic's History:

For over 45 years, Lange Animal Clinic has provided small companion animal veterinary services to residents of Pekin, IL and the surrounding areas.

Our talented and experienced staff are trained to ensure the best quality veterinary care for your beloved pets- whether it be a routine medical examination to more complicated surgical procedures. Our team will work thorougly to exceed your expectations during each and every visit.

Meet our talented team:

Dr. Colleen O'Rourke
Dr. Colleen O'Rourke DVM
Dr. Gail Mercier
Dr. Gail Mercier DVM
Dr. Kourtney Grimm
Dr. Kourtney Grimm DVM
Dr. Sandra Zygatdo
Dr. Sandra Zygatdo DVM



Called the vet @ 10am, had an appointment that same day at 1pm! I do not usually need to get into the vet so quickly but in this instance I did. Lange Animal Clinic has taken care of my little pet family since the day I brought them home. Always professional, never have to wait long for an appointment, expert care and they are compassionate to me and my pets! I never feel hurried and my questions are always welcomed. They are the best!
Brenda VanAtta (Client)
The friendly and professional staff at Lange is truly amazing. I would never take my pets anywhere else. They know you by name as well as know the pets by name as soon as you walk in the door. Been going here for 16 years and Dr. Colleen is wonderful. Highly recommended.
Paula Stanson (Client)
Thank you Lange Animal Clinic for managing my dog's care until the very end. I just had to put my dog down today and I am very grateful for the care your clinic, technicians and doctor provided in handling the event. Thank you.
Renee Waller (Client)
I just love this vet, been going here for over 30 years. Each employee truly cares for each animal. I had never had a problem. I know my fur babies are in great hands. Keep up the awesome work.
Anonymous (Client)