Well the coyotes finally moved on and for several weeks there was peace in the valley - but now the hawks have shown up. Looks like my girls will be back in the coop indefinately. The area is plenty large enough with good venilation, sunshine and shade and I'm rather fanatical about keeping it clean but I worry about things like parasites. Is there something I can use to dust both the soil as well as the hen house and nesting boxes to prevent worms or other diseases - at least until the predators move on? (Don't think I'll live long enough to see that happen!)