The cow rumen magnet gun(introducer) is an efficient, precise, and safe veterinary tool designed specifically for ranches. It accurately and precisely delivers rumen magnets or agents into the bottom of the rumen of cows through simple operations, thereby adsorbing metal foreign objects such as iron nails and wires that cows accidentally ingest due to licking, effectively preventing and treating traumatic reticulocytic peritonitis (commonly known as "metal disease"), ensuring the health of the cattle herd, and reducing economic losses on the ranch. Jestar supplies various types of cow stomach magnet guns.