Was called something along the lines of 'can't take the heat' or similar, in the clop w/ extreme fetishes folder, discord turns some people into ponies for some reason or another, and the main character ends up rutted by an earth horse

6944572
It could be Call of the Wild by Rustle my Jimmies.

At is exactly it, thanksya!

6944581 never knew there was even a website for this kind of stuff.

Damn, guess that means it'll never be finished. Always a shame when an author tries to bury their work like this. :/

One of the many 'this will never be finished and that makes me sad' stories.