I captured several war Jabberers and cave crocodiles from goblin sieges; I am trying to breed them, by chaining them right next to a nest box. Since then, none of them occupied the nest boxes.
Am I doing something wrong? How often would a "normal" egg-laying animal lay eggs? Can such an animal claim a nest box while on a chain? Technically, the chain is supposed to only limit movement range, isn't it?