I have a flock of 2 leghorns, 2 SL wyndotes, 2 GL wyndottes, and 2 silkies. My silkies are each brooding on several eggs at this time. Last week I found a broken and half eaten egg in one of my nesting boxes. Than this morning one of my silkies nests had been badly disturbed, an egg eaten, and my silkie was very distressed! It has to be a hen, as my house & coop is locked tight all night, and is very predator proof. So How do I figure out who the cuprit is? I know it isn't the leghorns as I checked thier really clean feathers and no sign of egg anywhere. Plus they tend to leave my silkies alone. My 2 SLW's do attack the silkies often. I need to figure this out fast so I can cull the culprit. Any suggestions short of slaughtering all of them?