First things first, take those spurs off! That horse is obviously not ready for speed and pushing her faster will only exacerbate the problems.
Go back to the basics: leg yields, arcs, walking and trotting a proper circle. Get that horse walking and trotting perfect circles, with her nose tipped inwards but continuing that forward movement before you ever attempt loping. Also get her vetted, teeth checked and chiro work. I definitely wouldn't be running her when she's blowing off, and most definitely wouldn't be spurring her and pushing her when she can't even turn properly.
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On that second barrel you can see that you're pulling back fairly hard on both reins too. Be careful with that, it's hard for a horse to turn when you are pulling back on both reins.
Good luck, keep us posted.
Remember, a good foundation is key, and slow work, slow work, slow work!
Last edited by AriatChick772; 02-18-2013 at 11:24 PM.