Due to the nature of cow's eating large portions of food without chewing, it leads to conditions known as Hardware Disease. This condition is caused when cows swallow a relatively heavy and sharp object such as nails, wire fencing, etc., which eventually finds its way to the rumen and the reticulum. The contractions from the reticulum can lead to irritation and inflammation , and this will seriously threaten the health of a cow so that the cow will lose their appetite and then their milk output will decrease and especially the hardware items may cause cow to die!
Cow magnets are popular with dairy farmers and veterinarians to help prevent Hardware Disease in their cattle. When a cow swallows a large smooth magnet, It lands in the first compartment of the stomach, and attracts the stray metal on its way by, holding it in a safe place. So that they do not penetrate the stomach wall. Therefore, it make sure to gain cows' appetite and increases milk output.
One magnet works for the life of the cow. These cow magnets also make a great addition to your science project. They are very powerful and are great for general experimentation with magnets. There are several kinds of cow magnets:
1) Ceramic cow magnet: This rectangular cow magnet is made of ceramic 5 (Strontium Ferrite) magnet material. Its special magnetization pattern causes nails and other sharp metal objects line up along the length of the magnet where they are no longer a danger to the cow. The FDA-approved epoxy coating is gentle on the cow and helps protect the magnet from chipping. Rounded corners ensure safe and easy passage to the reticulum.
2) AlNiCo 5 cow magnet: A favorite of dairymen and vets for over 30 years. This is the standard cast AlNiCo cow magnet with bright, metal finish. It is non-toxic and non-corrosive