Carnage On The Hill!

We walked down the hill tonight at twilight. At the foot of our path, at the base of the hill, we spied a big black feather, and then another, and another, and handfuls of smaller feathers; and let our animals lead us to other patches of more and more feathers all around. It got to dark to see before we found a carcass, if there was a carcass left. It was a buzzard for sure...but what got it? Anything big enough to take down a buzzard can take down a little cat. I don't like this.