““I can see what you’re worried about,” Mark cut in quickly, “and I assure you, it won’t be a problem.” “I don’t think you can, but what won’t be a problem?” “Butter bugs are highly controllable, ecologically speaking. The worker bugs are sterile; only the queens can reproduce, and they’re parthenogenetic—they don’t become fertile till treated with special hormones. Mature queens can’t even move, unless their human keeper moves them. Any worker bug that might chance to get out would just wander about till it died, end of story.” Enrique made a face of distress at this sad vision. “Poor thing,” he muttered. “The sooner, the better,” said Miles coldly. “Yuk!” Enrique””
