Wondering if I need to worry (for myself as well as the chickens) about breathing in the DE dust as I'm raking it into the pine shavings inside the coop? I noticed the other day when I happened to look up at the light that it sort of hangs in the air. The whole Diatamaceous Earth thing is freaking me out a little bit. I'm confident I got the right kind because it says "food grade". It's like flour with how dusty it is. BUT...how they heck do you figure out how much 2% is to put in their feed? I'm also about to switch them from "starter" food to "grower/developer" and am going to use Blue Seal Organics. I noticed on the label that there's diatamceous earth IN there already. Should I just figure that's enough? Can you give them too much of the stuff? Also...I built a box inside the coop for my girls to dust bathe in. At first I was going to put just the DE in there, but it's SO dusty....AND, they've gotten in the habit of bathing in their bedding, so I thought I'd be clever and mix some clean pine shavings in there with the DE. They WILL walk through the box from time to time, but nobody is getting down there and really having a bath. Any suggestions?