We've been free ranging our girls since last fall at least and have been very fortunate that we haven't lost any for quite a while. Unfortunately though, when my son locked them up last night there was one missing. Today my son found a number of feathers and part of a wing.
When I was poking around near that area, I found a small nest with one egg in it. I am taking a guess that one of my sweet speckled sussex was going broody and decided to sit on her new nest instead of returning to the coop and something got her.
I hope whatever it was doesn't return for more.

