Feral is the colloquial designation given to animals that are vertebrates but are not sapes. Ferals are characterized by their lack of opposable thumbs and, except with certain birds, the inability to speak.

Ferals greatly outnumber sapes. By mass, it is estimated that on land, roughly 98% of the mass of land-based vertebrates are ferals, compared to just 2% being sapes. The disparity in the waters is even more pronounced, with 99.7% of the mass of water-bound vertebrates being ferals, compared to just 0.3% being sapes.

Sapes often keep certain types of ferals as pets. The most common types of feral pet include, cats, dogs, rats, goats, parrots, horses, small fish, lizards, snakes, and frogs. In addition to their status as household pets, certain species of feral are used for their meat, such as cows, goats, chickens, pigs, and turkeys. Finally, there are certain species that are often used to perform tasks that would be difficult or unreasonable for a Sape to perform, such as horses, dogs, seals, and pigeons.