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U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
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| Freezemarks | ||||||||||||||||
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How to Read a FreezemarkThe BLM uses freezemarking to identify captured wild horses and burros. Freezemarking is a The technique is simple and completely painless to the animal. The left side of the neck is shaved and washed with alcohol, and the mark is applied with an iron that is chilled in liquid nitrogen. The hair at the site of the mark will grow back white and show the identification number.
Although every effort is made to apply freezemarks that are legible, occasionally freezemarks do get blurred. This happens when the animal moves as the iron is applied, resulting in all or some of the identification number becoming illegible. The following graph illustrates how to read a freezemark. If a mark is difficult to read, we recommend shaving the left side of the neck. You must know the freezemark of your horse or burro before making an inquiry to a BLM office about the animal.
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| Last updated: 10-20-2009 | ||||||||||||||||
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