you guy's go ahead and knock on that dog run all you want.
but I have had a couple of professional escape artist type dogs that used all of their waking hours figuring out ways to go out and see the sights around town.
I had one dog that broke out of a house I was renting just so he could lay on the front porch. [that and chase the mail man, keep the neighbor pinned in his car for an hour, and attack the garbage truck]
he broke out by tearing the curtains and blind down, then chewing through the window sill and opening the wood framed window by breaking it.
we had a whippet hound here that got her exercise by running across our yard and jumping the 6' wood fence, then going over the other one in the neighbors yard, and the next, and the next, all the way down the road then coming back and going the other direction to the big field.
this pretty much pissed off all the other neighbors dogs that couldn't/wouldn't do it and got a crew of those that could/would going until we had dogs scattered up and down the street in the wrong places, and a bunch of barking and howling and dog fights going on everywhere.