Lewis Cattle Oilers are a fully automatic, external parasites control machine that helps reduce anaplasmosis, pink eye, fly, flea and tick infestations. They are designed to be used year around and will help with lice, mange mites and ringworm through the winter months. We are a 51 year old company that manufactured in Canada for 45 years, but moved to Bryan, Texas 6 years ago. Proudly made in the USA!!!