I now use Deadline, and my cats (I have seven, plus a stray that I feed) totally leave it alone. Late yesterday afternoon I ran a line around one of my daylily beds that was showing snail/slug damage, and you should see all the snail and slug corpses I have out there today! Probably 50-60 at minimum! Some of them even died right at the plants after they gorged themselves on the Deadline first. The dark charcoal line you draw around a plant or flower bed isn't very attractive, I'll admit, but both my sister and I swear by Deadline now. Sluggo didn't seem to work very well for me at all. And the Deadline continues to kill them for probably at least a month even after the sprinklers have run every day too.
