Explore Science Occupations: A well known central Minnesota hoof trimmer, Jon Ainali, presented and displayed his skills for the Upsala seventh grade science class. Today in the dairy industry, all cows need the finest hoof trim to keep them productive. Dairy facilities have more concrete flooring, which wears the feet unevenly, and these conditions cause lameness. Lameness affects the over-all health of the cattle, which can rob a dairy owners profits. To keep cows healthy and productive, it is necessary to manage hoof care as carefully as nutrition, milk quality and breeding. Submitted by Holly Holmen-Herbes.