I am having a problem and its getting really frustrating. no matter what I do or how I build my nest boxes several of my main breeding girls eggs are getting cracked mostly at the tip of the egg and you cant see them till you candle. What on earth can I do different. I tried wood chips they kick em all out so I went to grass same thing. So i went to large straw still rejected it. padding the wood boxes to me would only cause fece build up. I thought about laying bubble wrapin them and topping that with hay then removing every few days. These are my main breeding birds as I said buckeyes cochins and white plymouth rocks. any advice would be greatly appreciated thanks. fyi it doesnt matter what kind of nest box i use this is happening everywhere.