DOOM OOZER!

This mega-massive parasite derives it's nutrients from humanoid and humanoid sized living organisms. Younger (and smaller) varieties are known for living next to chicken farms and stockyards. Other lesser oozers such as the field-oozer and the crop-oozer attack wheat stores and farming crops causing serious economic loss.
The Doom-oozer captures it's food by secreting a mucous substance that engulfs it's prey making them sluggish. It then penetrates this membrane and absorbs the contents.
The Doom-Oozer is a favorite subject for telepathic control.