Seriously! This is a use for the 10 million+ feral cats in the U.S. alone. Facilities full of these things. It'd take a small amount of outside energy to get the lasers to work initially, but then that'd be immediately self powered with about a 95% energy surplus. Limitless energy + no more cats burying their **** in everyone's yards + no more cats for crazy cat ladies to dump a bag of food on their porch per day for. I think this could be FJ's window to wealth. We need to crowd fund this **** .
Then we oughta feed the cats expired food. Food that can no longer be consumed by humans is often just ground up and turned into fertilizer, but cat **** can probably be turned to fertilizer just as easily.