Beach Chick
I rather went off the idea of feeding slugs to the chickens when I read on another website that they can get worms from slugs. So you do need to keep up witht worming the chickens, twice a year seems to be the recommended way to go.
Picking up slugs is horrible, all that sticky slime, why not use rubber or latex gloves? With all the rain lately they are everywhere.

I have a slug "prison" - a large ex-waste bin, set on bricks in a tray with water in so they can't escape, every time I find one I lob it in there, I've filled it with weeds so they can eat them and every now and then cream off a few of the slugs for the hens. I've had this for a while and the bottom weeds are now looking like compost.
Sue