About Us


For over 45 years, Lange Animal Clinic has provided veterinary services in Pekin, Illinois over three family generations. Our expert staff of Veterinarians, Veterinary Technicians, and Veterinary Assistants are trained to ensure the best quality medical care for your beloved pets-whether it be as a routine medical examination to more complicated surgical procedures. Dr. Colleen O’Rourke, owner and senior Doctor of Veterinary Medicine, takes great pride in making certain that every patient’s experience is handled with the utmost care, compassion, and economically in the best interests of our clients. As with Dr. O’Rourke, our professional expert team of Associate Veterinarians practice using the most current veterinary methodologies, procedures, and technologies.  Our associate veterinarians Dr. Mercier, Dr. Grimm and Dr. Zygatdo are experts in the field of veterinary medicine.

Lange Animal Clinic is a small companion animal clinic that provides services to dogs, cats, rabbits, birds, ferrets, hamsters, various reptiles and more.  We specialize in laser surgery, parasite prevention such as flea and tick preventatives, wellness exams, vaccinations including rabies prevention and of course heartworm preventatives.   Our veterinarians provide veterinary services to Pekin, IL including the surrounding communities such as Peoria, Marquette Heights, Tremont, East Peoria, Creve Coeur, Morton, Glasford, and other areas in Tazewell county.

To learn more, visit our website by clicking HERE.


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