As you may or may not remember, I've recently acquired a male and female giant cave spider. I managed to get them both locked away on chains in a pseudo temple, and then placed more chains just outside where I kept a pair of dogs, with the intent that the dogs would cause the spider to spew at them and harvesting could begin while I awaited breeding (modded to give birth, here).
I forgot about them, as they refused to give me any silk.
After a time though, they gave birth, and the hatchlings promptly loitered around their mother while avoiding my cage traps just outside. The hope that the dogs would also lure the young out seemed to have failed. Then, however, I got the message, "The Stray Dog has been struck down!" and lo and behold, the children scurried out and into the traps, but not before landing bites on the dogs and killing them via poison. No worries there, plenty more dogs.
However, in the process, silk was produced. I quickly ordered my cloth-lord to harvest it, and unlocked the main door to the temple. Immediately, a half dozen peasants rush out with cages to refill the traps, and along the way trash all but like 3 pieces of silk, and one manages to get himself caught in a cage. I've now built the cage, and he's alive... for now. He's a legendary mason and engraver, and I've used him to make slabs before, but not much else. I'd rather not kill him, but he needs to be punished for his ruining of bountiful silk! Ideas?
Also, I think I'm gonna put cage traps everywhere, as well as tame spider cages and wild spider cages, then release them all at once. I should have a few dozen spider corpses for harvesting, some re-caged spiders, silk, and shortly afterwards, caged dwarves!