93990, by George Saunders

93990 is a very short story in The Secret History of Science Fiction,but if you are adventurous it is available for free at the linked location--looks like something posted for coursework.  The story describes a pretty cruel animal toxicity study, the speculative element being that one of the subjects is not affected.  Always hard to know how to rate these--the writing sample size isn't large, and there's a single point.  I would say he succeeds.  Two stars for it.