Show her some rabbit holes by a hedge call her to them even if on a lead, do this a few time and say what's this hear , then next time your out walk to a corner and say hear what's this and point to something even if it's not there curiosity will get the better , then in the corner calmly get hold of the collar , and prAise the dog , after a good while who knows how long depends on the dog you can just say hear , . I also find this good but also let the dog run again after recall, and repeat over and over so that it doesn't think when it comes back it's going on the lead , can be testing I'