Once all 4 fillies were home, Zipporwhill was inducted as the fourth Cutie Mark Crusader. Applejack, Rarity, and Rainbow Dash all objected to the fillies eating her leavings, but they eventually relented with an agreement that it shouldn't be done in public and that Zipporwhill should be allowed to say no and not be dragged around like some object.

Zipporwhill's relationship with the other 3 ended up becoming a friendship with benefits as the fillies got a bit older and hormones took over.

Word got around fast because of the rather gross nature of it, and Cheerilee had quite a time keeping the rest of her class from picking on the CMC. Thankfully for the 4 fillies, Diamond Tiara and Silver Spoon were willing to open their minds a little and at least agree not to talk about it. After another few months, the 6 even became good friends.

Rarity was quite fortunate that nopony in the fashion world knew about her sister. The official story kept things rather vague, after all.

Twilight of course did plenty of experiments with Zipporwhill, and eventually published a book on her. She was able to replicate the effects in a spell, which was to be used only for emergencies as reversing the effects is hard and it turned out that the spell makes a pony go through food much faster than normal.

Quite a few ponies could no longer look at certain foods and beverages the same way again. Rainbow Dash in particular, after seeing Scootaloo show her what the big deal was, would get flashbacks and vomit at the sight of chocolate milk.

Author's Note

If a filly ever asks you to look at something cool, and they promise you it's not gross, run away.