Maybe take one of those dish pans and put it were she is laying see if she will use it then. I have 45 chickens and 5 guinea keets i use a rule of thumb, 1 box for 4 chickens but the more the better IMO lol.
My opinion would be to take the dish pans out, nail or screw a three or four inch piece of wood like plywood on the bottom of both drawer spaces and leave the dividers in that gives you four nesting areas instead of two, the lip will give the girls more privacy and add straw to the nest boxes my...