Magnesium-fortified horse salt brick | |||
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Magnesium-fortified horse salt brick. A block of salt fortified with 3% magnesium, for horses to lick. Source: Farm & Fleet Contributor: Theodore Gray Acquired: 28 March, 2009 Text Updated: 29 March, 2009 Price: $1 Size: 6" Composition: NaClMg | |||
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