I have 4 of those little giant nests for my 8 girls. I originally had only 2 but they all wanted to just use one, so there was some cackling while others were waiting (pushing, shoving) for their turn. The original 2 were only a few inches off the ground as a few of my girls are sort of heavy or slighty crippled, but I put the fourth one up above the others to give them something different and interesting to try to entice them to use more than one. No one touched the higher one until I added a 2x2 across to give them the opportunity to check it out without fully committing to going in... now I frequently get eggs out of 3 of the nests, including the higher one. They all still seem to want to lay in their favorite one, but at least they give in to laying elsewhere sometimes now.