One cow magnet works for the life of the cow! It is bright, metal finish, and is non-toxic and non-corrosive in use.

Cow magnets are popular with dairy farmers and vets to help prevent Hardware Disease in cattle. While grazing, cows eat everything from grass and dirt to nails, staples and bits of bailing wire (referred to as tramp iron). Tramp iron tends to lodge in the honeycombed walls of the reticulum, threatening the surrounding vital organs and causing irritation and inflammation, known as Hardware Disease. Cow magnets help prevent this disease by attracting stray metal from the folds and crevices of the rumen and reticulum. So that the cow will not lose her appetite and deseases milk output.