I'VE READ THIS OMG
Ahem. Pardon the outburst.

Apparently I've read this story a while back (when it got first published maybe???) Now I picked it up again and - OMFG! HELLO, OLD FRIEND! LET ME HUG YOU!
So.
Basically, I liked it very much. And I could not find it again. Until now.
This was like finding the forgotten treasure. In the words of Neil Gaiman:

“Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.”

By gods, this is one of those. ( )

This story is very consciously modeled after slave narratives (I've never read any of the originals, but it reminded me of the Octavian Nothing books), except in this case, the slave in question is a centaur. I like the concept of this story, and the execution in terms of style was done well. But I don't know that the story really used the "magical creatures as slaves" concept to say anything new about the subject, something that couldn't be said when we're talking about humans.