As a side note to that, dog owners will put a piece of plexiglass over the bottom screen inside, and add a sliding bolt on the inside of the screen door just below the slider opening by the handle.
The downside is, if you go out intending to close the main door and leave the dogs inside while you are gone, and forget to undo the sliding bolt first. Now to get back in you yank on the outer door and --oops!-- it won't open because the screen door won't open as well, being bolted shut.
The good news is you can yank really hard on the outer door, and it will come away from the screen door connector. This can't be good for it all, but at least you can get back in!
