We haven't yet seen a Snoozer controlled by anyone else, it seems that they can't move without 'guidance'. Which means, there are either Sligs (or other creatures) somewhere controlling them, or the Snoozers have been altered to work on artificial intelligence.
oddguy, as for your concept on making Flying Sligs work. I love it! It would fit in perfectly with a 3D world, but I guess the areas you could use them would have to be made a tad confined. Still, if we ever get to control a Flying Slig ever again
Alcar...