Well, not rats, really -- probably a raccoon or possums. We have plenty of both lurking around our neighborhood and backyard at times. This was a little surprising, though, because I found her just after sundown, and still very light outside (my wife had been out about an hour earlier and saw all five then). I had gone out to close them up in coop for the night and counted only four up on the roosts. Scanned the perimeter and found what was left of number five near the fence in the sparse brush that grows along there. Head gone and upper parts of wings eaten. Open/eaten portions of body felt cold and dry, but legs and body still a little warm, so must have been somewhere in past half-hour or so. Grrr... Will patrol a little later w/ the flashlight and air-rifle (we're in city neighborhood, so have to keep shooting quiet). The possums and raccoons tend to hang out on backside of our garage roof some nights -- lots of scat up there at times. So I'm wondering what sort of chicken-snatcher comes out that early, if/when they'll be back, and how early to lock the hens up in the future?