Please don't laugh at me but since I have filled in my koi pond I have this shop vac I used to vac the bottom of the two sediment ponds that I drained once a week. (Yeah, the pond was't thought out very well.) But ANYwho, I put the vac in my wheel barrel and rolled it over to the 8'x8' coop. All the girls were screeming, "BOMB,BOMB!!!!! ACKKKK!!!!" I opened one window on the bottom, shoved the hose and plug through and vacumed up all the dust and poo. WOW It was so easy. I'm using deep litter so I just got the dust and under the perches worked great! Just a thought for those of us that have a shop vac sitting around.