Hello Fellow Peeps, I have 12 chickens and was wondering if I need a dust bath for them. I've read were this helps to prevent parasites. They have a nice pen hooked to their coop with nice grass beneath. The coop is moved every 2 wks. to prevent them from depleting the grass. They are 9 weeks old and I have just started to let them free range in the evening. We have 5 acres to move the coop about but it all pretty well covered with grass or alfalfa. We do have some bare spots but not in an area safe for them (kids race track). So is a dust bath warranted or will they do just fine rolling the grass and alfalfa field? Any relpy is welcome.