We rescued a German Shepherd when I was in high school. Incredibly beautiful dog. One morning, I came outside and there was a chewed up dead lamb carcass on my doorstep. It looked like it had been dead for a while, so I figured "she must have found the carcass." The next day, there was a fresh lamb carcass on my doorstep. I told my Mom we had to return the shepherd, since she clearly had a loose wire - she retrieved sheep! We returned her to the rescue center and they found her a nice home in the suburbs.