The Secret Dark Side of Pecking Orders
Domestic chickens occasionally turn to cannibalism as a byproduct of their strict social hierarchy. When stress or overcrowding triggers aggression, birds may violently attack flock mates, leading to surprising and lethal consequences.
While we often view chickens as simple farm animals, they maintain complex social structures known as pecking orders. When these birds become stressed by heat, lack of space, or poor nutrition, their natural instinct to establish dominance can spiral into dangerous violence. Researchers have discovered that this behavior is partially a learned trait that spreads rapidly through a group. To prevent these outbreaks, farmers sometimes use specialized interventions like light manipulation or selective breeding to keep the peace.
Source: Cannibalism in poultry