I'm about to move my flock of chickens to a new coop. It has a concrete floor and is 8x8. I'd like to try the deep litter method, but notice that many of you say DLM works best with a dirt floor. So what modifications do I need for it to work with a concrete floor? Should I put some dirt from our garden on the concrete under the pine shavings to encourage the bacteria growth that helps convert poop and shavings to compost? Or just throw down 8 inches of pine shavings and hope it works? Also, if I'm using DLM, do I need poop boards? Or just let the chicken poop fall to the shavings and get mixed up over the winter? Thanks!