How often should the coop be cleaned, and what substrate should be used for deep litter? Currently they have peat moss in the ground level and I use shavings in the enclosed “second level” portion. The peat moss was great until we had a bunch of sideways rain and now the outer portions have turned to mud. The nipple feeder also leaks quite a bit causing a mud pile under it. I put a pan under it but one of my younger girls tipped it onto herself and was stuck underneath so I removed that.