Here are some videos of my normally placid 4 yr old colt.
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Basically what happened was, I decided that day, I was going to tighten the flank cinch 1 knotch snugger than I had normally done. He seemed fine with it, until I went to get on.
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This is how he has been his first few set of rides. This was maybe his 7th or 8th ride.
Innocent looking isn't he?