The problem sometimes lies in it becoming airborne. So your chickens roll around in it, dust gets carried by a breeze to the flower patch, the dust settles on the flowers, which in turn effects the bees. I personally choose not to use it. But you are correct, it isn't a poison. It all comes down to personal choice.DE isn't a poison or anything, don't sprinkle it where the honey bees frequent and it wont harm them.
Hens go broody when you don’t want them to… and won’t go broody when you do. 