The title refers to the Carl Sandburg poem in which "fog comes in on little cat feet"--which is apt since on every level Monte Merrick's new play is indistinct. Hedging his generational bets, he never decides if the focus of his seriocomic script is mom, a once wild poet now coping with creeping Alzheimer's, or the more unhappy of her two daughters, the one in New York with the faltering career and no boyfriend. Director B.J. Jones, playing to his theater's elderly constituency, concentrates on mom. But that doesn't seem right when so much of the story revolves around the middle-aged daughter and her rekindled romance with a high school suitor. Merrick's fogginess runs even deeper than this: though the issues of aging and memory loss are central to his story, he's reluctant to trouble his audience with uncomfortable truths about them. Through 11/14: Tue 7:30 PM, Wed 1 and 8 PM, Thu-Fri 8 PM, Sat 3 and 8 PM, Sun 2:30 PM. Sun 10/31, 2:30 and 7 PM. Wed 10/27, 8 PM only. Sat 10/30, 8 PM only. No show Tue 11/2. Northlight Theatre, North Shore Center for the Performing Arts, 9501 Skokie Blvd., Skokie, 847-673-6300. $38-$48.