Hi, I have 3 hens. They have a 3x3x2.5 coop and a 2.5x14 ft run. Right now the run is just dirt. I have noticed that the run doesn't seem to get full of poop. I think I've figured out why. We are in Israel in the Judean hiills and have large black slugs here. I have been noticing that the run is all slimy with their trails in the morning. I just googled 'what do slugs eat' and evidently some of them eat animal excrement. Has anyone else seen this? I'm planning to dig out the run and fill it with about 8" depth sand. I wonder if the slugs will still do the job with a sand floor.? Peggy Who wasn't sure to which category this belonged.