I currently have 7 hens, three are 5 years old and the others are 1 year old. Two of my 5 year old hens are currently broody, a silkie and an EE. This is the first time for the EE and she has taken to laying in the nest on top of the broody silkie and treating the silkie like her chick. She has become very protective of the silkie, going after any other hen or dog (our dog protects the hens) if they get too close. She will puff up and strike and she has even hurt our other silkie for getting too close. This is a very new behavior for her as she has always been very docile. Has anyone had this happen before? Any thoughts?