A chocochick with black feathers. Even their bones are black, just like a certain rare breed of chicken. For whatever reason, just their eyes are red. Allergies, perhaps?
—Mirage Manual entry
食う / くう / kuu is a rough way to say "eat", whose volitional casual form is 食え / くえ / kue ("let's scoff 'em down!"), leading to Kweh!