Our run borders a field and we have a few areas in the run which is a good daytime home for slugs. At night the run is invaded with slugs. I can't leave any hen feed out over night as the slugs devour it and leave their slime all over the dishes. I put out containers of beer to catch the slugs (they seemingly drink themselves to death) at night and remove them in the morning (I can't imagine that the beer is good for the hens). Is there anything else that I can do to get rid of the slugs, that won't be harmful to the hens? I wish the hens would eat the slugs but they aren't interested - I wouldn't be either!