My wife leaves for work early in the morning and really needs her sleep. However, our scrappy old cat Scab (he's 16) has a bad habit of getting overly excited at night, keeping her up. We can't put him out of the room at night, because he jumps up on stuff he isn't supposed to. He spends most of his time in our room sleeping, and although we hang out with him (along with the company of our other cat, who is younger and goes in/out), he seems over stimulated at night. What can we do to ensure that he'll be less active at night?