Purrley

Like Kobieeli suggested try the make like a tree thing and if she doesn't get the picture right away call her and praise her when she comes. If that doesn't work you could always try turning around and walking the other way as soon as she starts to pull, then when she catches back up to you, you turn back around and walk back the way you were coming...but you have to remember to praise her as soon as she catches up to you and when there's a little bit of slack in the leash. I've tried one method with Smudge and the other one with Winter, they both seem to work it's just a matter of remembering to do it.