Hi! I have three 25 week old Red Star pullets and was thinking about what i should be putting down on the floor of their run and coop. I've currently been using coastal hay, but was reading some threads on here and are warning against using hay due to crop impaction. So now i'm second guessing myself.... Can i just leave the run with dirt? and the coop floor is linolium tiles (for easy cleanup). What's everyone's opinion?? Thanks!