So I have recently bought my AQHA mare as a reining prospect. But whenever asking for anything she swishes her tail mad like. Her ears are always happy tho. Everything fits good and nothing hurts as she had a vet check a few weeks ago. But the problem is she does that, which is not good while reining, where the tail should be not moving. Her tail is a little thinned out and about in between her hock and fetlocks. Would she Likely stop with a fake tail weighing it down more? What would you suggest to stop this behaviour? Btw there is no flies here, and If I'm just walking with a loose rein not asking for anything she doesn't do it.