I don't think this is an emergency, but while moving my coop and run today to prepare for the new coop I'm going to build, I put some old potting soil into a lowered corner of the new run. Just really nice black dirt with a bit of those white vermiculite balls in it. The 3 hens came and took a really thorough dust/dirt bath in it, and then the BO and EE started acting all drunk and stumbly. The BA seemed fine. This lasted only about 15 or 20 minutes and now everyone seems fine. What happened? Should I be worried? I have since put sand on top of everything.