So a few months back we got a new dog a Shollie (German Sheppard and Collie mix). The dog knows it's name and inside the house it listens and plays very well. It will obey commands to sit, come here, lay down etc. But once she is outside off a leash it's another story. She seems to just want to play and ignore your commands, she won't stay at all or listen. What can we do.