The sisters, Murder and Mayhem, really like lying in the front window. After knocking out the screen a couple times, I finally had to nail the sucker in place, because they really like to roll right up against that sucker:
The screen hasn't fallen out since I put nails in, and they don't seem traumatized by the times the screen fell out and dumped them onto the ground, so I guess all is well. For them, anyway. Leaving the window open so they can get some screen time makes it hard to cool the house. But I already lost that argument.