shes a baby mate, forget about trying to gt her to get hunting, thats the easy part..just let her explore and learn the way of life, don't over do the training, and don't allow to much free reign... If you do either you will regret it, play training is the key in a few months time, just stick to that recall, and the sit thats the foundation mate.
And for the initial question, she will soon be ripping holes through the long grass and eventually bashing brambles, you want her to do when you have asked for it otherwise you will release a free hunting machine!
Good Luck mate