I was reading a book last night and it said that egg production decreases a lot after 2 years. The book suggested that you process your chickens at 2 years of age and start with new chickens. So I was just curious do you keep your chickens until they are old and grey, Do you process when egg production goes down ( if so about what age do you process ) or do you buy or sell them. Just curious what everyone does. Our chickens are pets but, at the same time I want a small working little farm.