Any suggestions for this problem? Two or three of my 10 chickens keep pushing the straw out of their nesting boxes. If I don't replace the material back into the box within the day, the eggs break. If they egg cracks, the problem gets worse...they destroy the egg. Now, daily I'm finding nesting boxes with bare wood and destroyed eggs. I have tried to put wood chips in the box. They push this material out too. So I'm back to straw. I have placed cardboard on the bottom of the boxes to try and cushion the dropped egg knowing they are pushing the soft material out resulting in the plywood base being exposed. This has helped a little but the problem still exists. I have 4 nesting boxes total. They only started this odd behavior since we added 4 new chickens to the coop. The hens are about 16 months old. All 10 hens started out together. They were separated into two coops at about 3 months and then reunited at 14 months because the chicks were split between two families and family moved away and returned their 4 chickens to me. Has the dynamic of adding 4 hens back into the mix caused these bad behaviors? I'm not sure if the chickens doing this are from my original 6 of some of the recently added 4 (same breeds). So frustrated. Please give me some ideas on how to remedy this problem.