You watch from your Overseer Feeds. Your Arrays are currently housing a large tribe of Slugcats. They work hard, foraging metal scrap from your machines and food from the rooms. A few Slugpups play here and there, but many are asleep in a big fluffy heap. Small nests of metal and debree are nestled in between the hot water pipes. Your Arrays are unfortunately dry, warm, and offer plenty space but also tiny nooks for sleeping and climbable bits to help the young ones learn motor skills. It was so appealing to that tribe. But annoying for you. When they dropped into your chamber and you said they couldn't stay here, the tiny, fragile Slugpups had all burst into tears. And the adults chittered angrily for upsetting the babies. Of course, you can't understand Slugcat language, but they can understand yours.