I have a 19 month old Cochin hen who I "adopted" 3 weeks ago. Her previous owner said she used to lay on her nest all day. Here, she has shown no interest in the boxes, though I'd urge her in (i.e., put her in) a couple of times. Well, today she's been in the boxes all morning, but no egg in sight? She circles and scratches until there is no straw/shavings and moves into the next box... whats the deal? Thanks!