I figured I misquoted one of them and would have to get the sharpie out...haha

What's the purpose of the black lines/rope connected to the reins?

My sister has used them within their cutting program. They loved the hardiness, agility, and resilience of them but had trouble keeping them inside the fence.

So when a horse is moving around/pulling away from the farrier would you follow the same method (moving the hind)?