Mammalian infants have a "rooting" instinct (moving their heads so as to bring their mouths towards whatever is touching their faces) for seeking the nipple, and a "suckling" instinct for extracting milk. The offspring of domestic animals, including piglets, calves, lambs, and foals, engage in a behavior known as teat seeking, sipping, and suckling. This strong instinct occurs in most species within minutes of birth, and serves both to connect the young to the food source and to encourage bonding between mother and young
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