When I was in grade school out in SoCal we went on field trip to Italian dairy, Giacomazzi or something like that. Weirdest thing was when farmer showed us a magnet shaped like a thumb. They shot these things down cows throat when young, before they were put on pasture. Caught any bits of metal(fence/bailing wire clippings, etc.) and kept in them in first stomach, so didn't puncture intestines. Does heifer on right have magnets in stomach to catch dessert forks?