Last time I brooded ducks, there were 5 in a brooder with a solid floor. Changing towels twice a day still left an odor. I knew I needed something different for 10. Did a wire bottom in a hutch type brooder. NO SMELL! Yay! Even with towels down for their little feet to get them started, I didn't want to put them directly onto the wire just yet. I will never ever brood ducklings in something that has a solid bottom ever again. Having the air flow below has made all the difference! No wet bedding, no wet + heat+ confined space to create a smell. The towels around the water don't even get that wet, they dry out pretty well. I still change the towels twice a day because there is twice the amount of poo, but the odor doesn't get a chance. This is great, I'm having so much fun with them!