"Hm? No, they're far too small to eat. But I am going to drain their life energy so I can measure it. I'd like to be able to do it in such a way as it doesn't kill the subject, but the process isn't perfected yet. Mice may be too small for that, anyway - they really haven't got much as it is," Herbert explained, opening the box and puling out a set of wires with small metal clamps on the ends.