Stones for Sally

Female Sally Any day in the week, you may visit Sally's cage to find that here and there, spaced in casual fashion on top of the wall, are small roundish stones, perhaps half a dozen of them. There is generally only one stone for any one space between two pipes, and the interval between the selected spaces varies. However, the stones are lined up rather nicely we think; each one has been pushed from the rear until it is roughly an inch from the front edge of the wall. And sally does it all herself. She picks up each stone from the floor of her cage with her pointed prehensile lip. Lovingly she turns the stone about in her mouth, all the while wandering aimlessly about her enclosure.