Hi guys, I am new to chicken world. I have purchased whole coop with 9 chickens from somewhat local guy who was moving into rental and needed to get rid of all the setting. Coop has 6 nesting boxes, three on lower and three on top level (one on top of another) however, for some reason in a whole week that I have them, I've never seen they lay eggs in the right side boxes (top/bottom box). For some reason they love to use the most left boxes top and bottom box and lower middle box (but not upper middle box). The bedding is all the same in all the boxes and now of course bedding is much more fluffier in the unused boxes. Is this a common trade? Do hens choose only specific boxes for whatever reason only known to them and never use boxes the they did not like?