Why Didn't I Think Of That?

Last summer I bought this inexpensive screen door-thing for my back door.  During the warm seasons (defined around here as every season but High Winter) I leave the back door open while I am home working.  The dogs can wander in and out and Annie can complete her total destruction plan for my garden.

So this screen isn't a door, but nylon mesh with a slit in the middle.  Magnets keep it closed, but it's really made for the dogs, who can just walk through it via the split.

Now, why didn't I think of that?

Murphy's Day