my wild one would jump through the screen off the second story?

Your idea of a run inside a pen is an interesting one. I'm still losing the battle of the pen, while making progress outside the pen. I took her chain-gang chain off Saturday so she could play with a visiting dog, and she stayed right in the yard. That is until I said "let's go in", then she tore off into the woods, but came back in about 10 minutes. Not too bad for her. A few more months of being a convict dog with a chain trailing behind her might work yet.