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After you feel like you've gotten decent control of your mule in the halter and on the lead rope, you can start to work on a little more desensitization. The spots that Ty likes to really focus on are their legs and blind spots.
22 Foot leadline is attached to the halter for leading.
A correct approach can build bravery into your horse.
Buck uses a tarp to desensitize a horse to its noise and feel. He then encourages the horse to walk across the tarp with confidence.