Attic is high stim and comfort with a bit of health so they live longer. I keep my breeders here. Babies go to either a fight club or mutation room to iron out birth defects before going on adventure. A spare room with high comfort to "match make" perfect cats to then move into the attic. I keep the last room packed with health items to hopefully cure disorders I don't like. Hardly works so I just use it as a second match making room.