Still working on a lava blade so I can skip the caldron, but a dispenser on a two repeater pulser will restock your live chickens with out a problem IF you can keep it stocked
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I don't know if I should be ashamed or proud of my latest find. Maybe it will work with wolves.
What you see is two stairs facing each other separated by running water. Second level is 3 rows of steel bars making a grid. One the chickens get their head between the bars and stairs they stop moving put keep producing eggs.