My Sadie is 8 months old and we were doing trail walks off leash and training in the yard with no leash. She seemed to never let me out of site and would always come when I called her. As soon as she turned 7 months old she decided she did not need to come when I called her back anymore. We don’t have a fence and luckily A neighbor 1/2 mile away grabbed her as I was chasing her through a thicket. Yesterday we went to an open field we always go to so she could run ( there is a fence on three sides) and she refused to come even though I had bacon. Some of our best times are wandering through the woods off leash but now I don’t think I can trust her. Has anybody else experience this. I don’t want to keep her on a leash outside for the rest of her life but she is way faster than I will ever be. I think she is tracking squirrels and birds which is fine but I need her to come back. She always comes in the house. Anybody have any advice?