Can hens go senile when they are in old age? My oldest hen is over 9 years old.. she is a Japanese Bantam. She has survived illness.. a dog attack, getting lost in the forest.. and she is my only hen left from the first ones I ever owned. I am very attacked to her. Just lately I have noticed her acting out of character. She keeps separating herself away from the flock and wandering off into the distance on her own. The chickens usually stay within sight of the coop.. but she has started to wander around to the front of our house (something they have never done before).. across the front garden.. through the orchard, around the lake and into the fields. She seem on a mission.. walking fast looking like she is searching for something.. seems in a hurry. I have to go and get her if she goes too far. Other than this she seem totally healthy.. just a bit stiff on her legs. She kind of seems in a world of her own... Thanks.