I adopted an australorpe when she was already 4 years old thinking it would just be a short stop over before freezer-camp, but she ended up staying for almost a year because she was such a great layer. Even at her age I was getting daily large/extra large eggs with smooth solid shells. She did have some funny bald spots around her chin where she just never got them back after a molt so she wasn't the prettiest anymore, but that hardly matters when she's such a good layer. I did eventually decide to cull her when she took a big chunk of skin off one of my new chicks and went back for more. I understand that pecking-order duels are nopamal, but have no patience for violent aggression that leaves major injuries on my other birds.