Twitter 上的 Weird & Interesting："Cows are fed magnets that stay in their stomach for life to collect metal objects like nails or barbed wire that the cow will occasionally eat, thus preventing
Hardware disease - Wikipedia
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The Wife of a Dairyman ~ Churned in Cali: How a Magnet Can Save a Cow's Life
The Wife of a Dairyman ~ Churned in Cali: How a Magnet Can Save a Cow's Life
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For cows, a magnet one day can keep the surgeon away – A new I don't know thing for curious kids – 2 New Things
Attractive Prevention- Why Choose Cow Magnets
Hardware Disease in Cattle
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Animal Healthy Care Cow Magnet for The Stomach of Cattle - China Cow Magnet and Ferrite Magnet
Master Magnetics COW-CP6X4BX New Ferrite Cow Magnet, 0.625" Diameter, 3" Length, Black (Pack of 4) : Amazon.ca: Industrial & Scientific
The Wife of a Dairyman ~ Churned in Cali: How a Magnet Can Save a Cow's Life
BOVIVET Ruminal Magnets - YouTube
What are cow magnets - Zweber Family Farms
Tiverton farmer puts magnets in cows' stomachs - BBC News
Cow Magnets
Magnets can help prevent hardware disease in cattle herds
Feed Your Cow A Magnet - LA STEM STORIES
