Join Date: Oct 2007
Location: Alberta, Canada
• Horses: 0
Just a guess, but usually when you're on your horse you're helping to balance him/her, and when they're on the lunge they have to do circles that they normally wouldn't while just being a horse, so they have to figure out balancing things for themselves, and some horses do get frusterated with it... or they could just be used to not getting away with anything while you're in the saddle, so they figure they can just do whatever they want.
How's your hand?
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