So, I'm moving 800 miles away and taking my dog with me. Problem is, she's a runner. She was a stray and was beaten I'm pretty sure, and she's scared of everything. Her home she's used to is in the city, and its filled with houses and people. Her new home is on a piece of land that's 23 acres. Problem is, I'm scared if someone leaves the door open, she's out, and she's gone. I'm getting her micro-chipped as soon as we get there, but I'm wondering if anyone has any experience with like GPS trackers that work in the mountains? I'm not too sure if they will work in the hills, or what to do exactly. The boyfriend is putting in a yard that is fenced in for her and we're putting a doggy door, but there is always the chance that she'll slip her leash or get out no matter how careful we are. I appreciate the help! Any suggestions or experience will be helpful!