I was wondering if adding curtains to the nest boxes would help an egg eating problem? They started off just eating 1 every now and then but now I am only getting 7-8 eggs out of 13 layers per day. (Normally we got 11-12) so I'm thinking they are being more sneaky now. I have plenty of material to do curtains, I'm just not sure what they need to look like...do you cut the fabric into slits? just cut one line down the middle? or don't waste my time?