I just got done de-worming my chickens for the first time ever. I'm very happy I've done it as I've lost 2 in the past year, and one appeared to be headed in the same direction. I'm about 99% sure worms were the problem, however, I'd like to not have to do that twice a year, or even once a year if I can avoid it. I've never had a problem with worms until I built them a fixed run, rather than the tractor or free-ranging they're used to. I would like to continue using the run once spring hits and the four feet of snow in it has melted, but I was wondering if there are some tips to help make the run a less worm/parasite friendly environment in a non-chemical way. My two thoughts are either to regularly (not sure how often) dust the run with DE. Would that do anything outdoors? Otherwise, fill the run with several inches of sand. Would that do the trick? Our soil is already pretty sandy, but not sandy enough to prevent the run from getting muddy in very wet weather. What are some opinions on these ideas, or what are some of your methods?