My dad and I are working on the design for our chicken coop and are trying to figure out how to build the nests. We never got the nests in the first coop off the ground, so we haven't quite done this part before. We're using a 14"HX14"WX12"D nest size, four nests wide, two high (eight total). In our chicken book it says to raise nests 18-20" off the ground - will raising it so that the first level is 24" up be too high? We'd like for them to be able to use the space beneath the nests and need to accommodate for bedding depths. Although, if the bedding is 6 or more inches deep, then the nests will only be 18 inches and less from the actual "floor" - that will work, correct? Also, how to build the rails in front of the nests.... Will chickens walk down (from side to side) of a 2x2? And, with 2 tiers, if we build the bottom rail farther out than the upper one, so that the chickens can hop from the first to the second level, how much father out should the first one be than the second? A foot? Or will less than that work? Thanks!