This might be a weird question. I have had three chickens for almost three years until two days ago when one of my girls died suddenly (necropsy results pending). I've been keeping an extra close eye on the remaining two looking for symptoms and one has been acting a little odd, but not similar to the symptoms shown by my deceased chicken. She is not clucking or vocalizing hardly at all, she seems less energetic, she's not as quick to go for food as she used to be. She still eats plenty and appears healthy. The hen who died was the most dominant of the three and the hen who is acting odd was at the bottom of the pecking order. So my question is, do chickens become depressed when one of their own dies in a very small flock? Is my hen acting weird just because she doesn't have the alpha female clucking at her? Is it a matter of less competition making her lazy? Or is this something I need to consider as a health problem? Additionally, are two chickens enough to keep each other company?