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Cows are Animals that can be herded by the player as a mobile, controllable food resource. They can be captured by moving a unit close to one, at which point the player gains full control over the cow. When a player decides to harvest a cow, the animal is slaughtered in place and can no longer be controlled.
A possible downside to cows as a food source is that they may be captured by enemy troops if left undefended. They are generally found in groups of two.