My daughter has a few and just fenced off part of the garden for them to forage in. Nice eggs! The family have the other two thirds to play in. I get ours from one of the teachers at school who's got a large plot with some chickens and sells a couple of dozen eggs per week in the staff room.we have four and you wouldn't know they were there apart from the devastation they have performed on the garden.
I have no room for anymore but these would make a good starting point for someone. I have 2 black rocks and 2 warrens.I'll soon be 'dispatching' around 38 laying hens that are no longer commercially viable. Does anybody want a few? They are Black rocks and still lay around 3 eggs a week each.