yes, many solutions online,
from what I read - the door 12X12"
and the laying box about 14X?
my neighbor has many chickens and says they use only 2 boxes
we are building a coop and looking at the same - sand,
as the problem with pine chips is that it is so hard to pick the poops;
maybe an insulated double floor?
Dieter
(Willamina, Oregon)