Welcome to Lewiston Veterinary Clinic Lewiston Veterinary Clinic is a locally owned clinic that has been in business since 1947. We offer veterinary services for small and large animals. Lewiston Veterinary Clinic was established in 1947. Lewiston Veterinary Clinic is a locally owned clinic that has been in business since 1947. We offer veterinary services for small and large animals. You will have access to all the nutritional supplies you need to keep your animals happy and healthy.