Not sure why I came over all yokel in the title but I felt I needed to 
So, picture the crime scene. Patch of blood on the hen house floor (smallish, slightly larger that a 50p). Three girls with no evidence of injury and two chicks running with them who are also fine. No recent history of laying problems.
Evidence: spotted last week, Christopher (smallest hen) running round TWICE with a shrew and a baby mouse half down her neck. Greedy thing.
So have I gained some rodents do you think and was there murder done? Any other explanations?