To survive, the fetii join together with other fetii zombies of various kinds of animals. For a majority of the time, they will not attack their prey. However, when faced with a position where they would need to attack, the fetii spray acid from their mouths and use their umbilical cords to choke their foes. They also have a distinctive high pitch screetch which also frightens enemies away. Fetii generally come out at night and at dawn versus the daytime.