Cloudsdale

After a harmful pesticide was accidentally released into Equestria, the crops and plants soon died quickly, leaving only a few plants in the Everfree the only plants left in the world. Without a food source, ponies had to resort to eating meat. After the animal population died out quickly, leaving the animal species itself endangered, the ponies of Equestria soon had to resort to the unthinkable. Cannibalism. Many ponies went into hiding to escape the chaos taking place everywhere in the world. Some ponies were able to maintain their humanity, but the majority of the population resorted in the cannibalism. Soon, major cities became slaughterhouses where ponies were killed in the masses. The Princesses were overthrown, tortured, brutally murdered, and eaten.
There is no more order in Equestria.
Only the fittest will survive.