At that age, Harley thought it was a big game if he got out without a leash. I never took him without one, we lived right beside a very busy street. I was always very careful with him. He was like a child to me and I would have died if he had been hit by a car
But a few times, he wiggled out the door. One time he dragged me out onto ice and i fell and the leash went flying!!! yeah sure laugh now! But i was pregnant!!!
He did run, but all i had to do was go inside and hed get a little worried and come wait at the door (i hated doing that b/c of the busy street, but it was better than me chasing him and he thinking it was a game).
When he got out with another dog, that was it he was gone. I chased him and my moms dog over a mile once and was very late to work that day. I probably never would have got them back, but somebody jogging grabbed them. I didnt have their leashes, i just dropped everything and went after them. That was fun, walking a mile hunched over hanging on to 2 collars.
But now he always goes out leashless. We live in the country with very little traffic. He has no desire to run. Occasionally he takes off after a cat or rabbit, but they run into the woods or the field behind the house. He cant go far, he trees them and that is it.
If your dog does bolt, dont chase it, you will only encourage. Get a treat or ignore her or something