What they have is, well, a kind of lymph that permeates every tissue and transmits nourishment along the interfaces. Waste products go out the same way, osmotically. In terms of process, it’s structurally analogous to your own kind of circulatory system, except there’s no network of blood vessels hooked to a master pump. The life-stuff just oozes through their bodies as though they were amoebas or sponges or some other low-phylum form. Yet they’re definitely high-phylum in nervous system, digestive setup, limb-and-organ template, etc. Odd, you think. The thing about aliens is that they’re alien, you tell yourself, not for the first time.

The beauty of their biology for you and your companions is that it lets you exterminate them so neatly.

You fly over the grazing grounds and drop the neural pellets. The Eaters find and ingest them. Within an hour the poison has reached all sectors of the body. Life ceases; a rapid breakdown of cellular matter follows, the Eater literally falling apart molecule by molecule the instant that nutrition is cut off; the lymph-like stuff works like acid; a universal lysis occurs; flesh and even the bones, which are cartilaginous, dissolve. In two hours, a puddle on the ground. In four, nothing at all left. Considering how many millions of Eaters you’ve scheduled for extermination here, it’s sweet of the bodies to be self-disposing. Otherwise what a charnel house this world would become!

Suppose the Eaters…

Damn Herndon. You almost feel like getting a memory-editing in the morning. Scrape his stupid speculations out of your head. If you dared. If you dared.

* * *

In the morning he does not dare. Memory-editing frightens him; he will try to shake free of his newfound guilt without it. The Eaters, he explains to himself, are mindless herbivores, the unfortunate victims of human expansionism, but not really deserving of passionate defense.