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On Monday we learned about a vulnerability in the encryption technology that effects most of the internet, called Heartbleed. Our team grabbed their lab coats and leaped into action to patch the vulnerability on our site.

We are happy to announce SteveSpanglerScience.com is no longer vulnerable.

While we believe we have kept out all the bad guys, we want to make sure our customer's information is safe. We are requiring that all of our customers change their password for their accounts on SteveSpanglerScience.com.

To do so, click the link below and enter in the email address associated with your account. Once you receive an email to that account, follow the simple instructions to reset your password.

Reset your password - https://www.stevespanglerscience.com/customer/account/forgotpassword/

If you have any questions on password resetting, please call our Customer Service team and they will be happy to help you. 1-800-223-9080

If you have any questions about the vulnerability please email security@SteveSpangler.com

As this did effect most of the internet, we also recommend that you change your passwords on all of the websites you visit.

Thank you for being an amazing customer!

-- The SteveSpanglerScience.com Team

Questions? Give us a Call: 1-800-223-9080

Cow Magnet

Cow magnets are used to help prevent Hardware Disease in cattle.


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Item #: WMCW-100

Usually ships the next day.

Recommended for age 8 and up with adult supervision.

Availability: In stock

Cow Magnet

These super strong cow magnets have earned that name by saving countless cows from developing the dreaded hardware disease. How? The solid Alnico magnet is placed in a cow's first stomach to collect all of the metal objects that poor Bessie might accidentally eat. Cows just can't tell the difference between grass and nails. Ouch! Recommended for children ages 8 and up.

What's Included?
  • 1 Cow Magnet
    • Dimensions: 3" (7.6 cm) x 0.5" (1.3 cm)
How Does It Work?

Cow magnets are widely used by ranchers and dairy farmers to help prevent Hardware Disease in their 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 recticulum, threatening the surrounding vital organs and causing irritation and inflammation, known as Hardware Disease.

The cow loses her appetite and decreases her milk output (dairy cows), or her ability to gain weight (feeder stock). Cow magnets help prevent this disease by attracting stray metal from the folds and crevices of the rumen and recticulum.

One magnet works for the life of the cow!

Customer Reviews

Great quality and many uses. Review by Marilyn (Bobbi) Gorman

Purchased this mainly for experiments with removing iron from cereal. Always very effective with the right cereal product. Of course the magnet makes a useful tool around the house for lost metal objects. (Posted on 4/12/14)

No sewing box should be with out on! Review by Denise Gonzales

I have kept a cow magnet in my sewing basket for years to pick up stray needles or pins that may drop on the tile floor or carpet. It picks up pins much quicker than my eyes can spot them. In a pinch it works like a pin cushion to hold my pins in one place. (Posted on 4/3/13)

Second Grade Hit Review by Nancy Hammond

Virginia Standards of Learnning include the uses of many different kinds of magnets and the cow magnet is truly one that amazes my students (and me, too!). So glad to have one that can bring this to a hands-on (minus the actual cow) experience! (Posted on 3/23/13)

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Warning - Choking Hazard