my girls have started eating eggs. anyhow, i am doing several things to try and break this habit. i am going to rearrange the coop as one thing. my question is this. right now i have a set of black plastic nest boxes that have 5 on bottom and 5 on top, stacked together. (they are made that way) they are sitting on the floor of the hen house right now. should i hang them on the wall and if so, how high up? so mad at my girls right now!!!!!