[He could be offended or he could do science. It's not that much of a decision.]

In order; I don't know, they seem to scavenge organic detritus like Terran cockroaches but I haven't had time to make a study, I'll call some people back in the institute and see if I can find out, but I expect given their average size that if they're predatory they'd be competing for food with the cats. I'm hoping the cats will eat them, so whatever poison should hopefully be less severe on mammals.