For a while now,ive been working on her suppleness and getting her to collect herself,when I bought her she was SO stiff! But anyways,ive just started her on barrels,shes a lefty =),but her second barrel she drops her shoulder and gets really stiff coming around it. How would I help to get her using her butt and get her to stop diving into the barrel? And I can also tell she's going to be a barrel hitter because even at a walk she'll just turn into the barrel too soon and knock it over. Whenever I warm her upshes soft and collected but once I do barrels she's stiff again?