James H Schmitz's "Forget It" aka "Planet of Forgetting" (novelette, free): An unusual animal defense against predators
Fact sheet.First published: Galaxy, February 1965.
Note: "this cover story was mistakenly listed as "Planet of Forge" on Galaxy's TOC."
Eric Flint on online version I've linked in download link below: 'we changed the name of the hero, did some rearranging of paragraphs in the early sections of the story, somewhat modified a few paragraphs of background material to make it fit the Hub setting, and cut a short "trick ending" that wasn't really part of the story itself and wouldn't fit the Hub setting.'
Download full text from BaenCD.
Nominated for Nebula Award 1966 in novelette category.
Related: Stories of James H Schmitz.