ogs learn to use their bark constructively with humans. They bark to get fed, to be let in or out of the house, or to play. Because barking does not automatically convey aggression or fear, it can be used for a wider range of purposes. This process is akin to that which allowed humans to develop language: the dissociation between sounds and meaning.
A certain cry from a pup triggers the release of oxytocin in the mother, causing the release of milk. A mother can differentiate between the voices of her different pups. (Fogle, 1990). Dogs make five basic sounds: a cry, whimper or whine; a bark or growl; a howl; a yelp; and a moan. These sounds communicate various individual, physiological and sexual information. Communication by sound is one trait that has been
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