Slugs! Gawd, I hate 'em...!

I feed my cats on an abandoned urban lot I'm slowly but surely landscaping. I also garden (I grow vegetables) on that lot. Ennyhoo, I put out dry food for the cats after work; the next day I find it slimed by slug trails. When it rains, I often find drowned slugs in the watery slurry that used to be cat food.

I understand that I need to build some kind of overhead shelter for my feeding station, but how do I keep those damned slugs out? They also end up in the water bowl....

There are lots of commercial slug traps that drown them, but hte best is to put out some sweet liquid or beer in deepish bowls. Whatever you do don't use slug bait - last week when I lost Napoleon to poison my vet said that slug poison was the second most common cause of poison in cats, after rat poison.