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Cow magnets are primarily used to prevent hardware disease in cows. Hardware disease is caused by cows inadvertently eating metal like nails, staples and baling wire, and then the metal settles in the reticulum. The metal  can threaten the cow’s surrounding vital organs and cause irritation and inflammation in the stomach. The cow loses her appetite and decreases milk output (dairy cows) or her ability to gain weight (feeder stock). Cow magnets help prevent hardware disease by attracting stray metal from the folds and crevices of the rumen and reticulum. When properly administered, one cow magnet will last the cow’s lifetime.

Cow magnets for sale come in alnico, ceramic and Ru-Master™ materials:

  • Alnico cow magnets are composed of aluminum, nickel and cobalt, and they sometimes contain copper and/or titanium.
  • Ceramic cow magnets are composed of iron oxide and strontium carbonate.
  • Ru-Master 5™ cow magnets are composed of our patented design which features five powerful ceramic magnets strategically assembled with power-enhancing pole pieces for superior magnetic strength.

Cow magnets can also be used for 3D classroom experiments to demonstrate magnetic fields and a variety of investigations.


Interested in learning more about magnets? Check out Polarity - a magnet blog. View Articles Forward Red Arrow