Because I've been so involved with other stuff (me).
But Skip is looking great! He's put weight back on, has his appetite back and can be seen stalking gophers throughout the day. Since the weather's cooled off, he does spend more time inside, sleeps on the bed during the day, but when it warms up, he's back outside (we've had some really cool weather, in the 30s in the morning warming up to the mid-fifties, which is just really weird, I'm used to having the doors and windows open year round).
But whatever was eating him, has left the building.