We had 5 RIR hens and they were in there outdoor fenced in playpen ( the dog pen ). We were inside and heard squawking. We went out and a weasel had killed one of them and was gone - in seconds. The other hens have been off their feed and really quiet for nearly a week so far. They were all raised together since they were one day old and they really seem to miss their sister. The laying is way off and they are very subdued. I am amazed how good their memory must be.