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Puppies are born deaf, and this is the last of their senses to fully develop. They can't hear until they're about three weeks old.
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  • However, the most often reported signs of congenital deafness includes: Aggressiveness when playing with other puppies Ignoring squeaky toys and other noisy toys No response to loud noises such as doorbells, barking, whistling, clapping, and yelling Abnormal amount of sleeping compared to other dogs Jumping or snapping when woken or touched when not looking Lack of activity Ignoring commands Unusual vocalizing More items...

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