We have a hen which we found 2 1/2 years ago, and thought she might be 1-2, but can't say since we never had chickens until her. She is a Bantam Brahma. She has been normal and a good layer. Two days ago we noticed she wanted to stay in the coop, in a nest. She lays an egg, but won't come out to free range. She makes a quivering noise. I keep water and food for her in the coop, but not sure she is eating or drinking. Could she be an old girl?