I had a hen last year that would crack the eggs on the nest. She has started again this year. PROBLEM - not sure which one is doing it! I have 4 cochin/silkie hens and a cochin roo. I try to get them quickly, but to no avail. I have grit, food, water and fresh fenced run. Thought she had stopped because another hen was setting. Only have 2 nesting boxes. Other than gathering quickly - what else can I do? Thanks