Dogs possess an acute sense of hearing
Some modern breeds have better hearing than others, but they all can detect noises well beyond the range of the human ear. Dogs are able to register sounds of 35,000 vibrations per second (compared with 20,000 per second in humans), and they also can shut off their inner ear in order to filter out distracting sounds.
the olfactory centre is relatively highly developed.
It is arranged in folds in order to filter smells from the incoming air. Some rescue dogs are trained to follow a scent on the ground, and others are trained to scent the air. Both are able to distinguish one
person from another even after a considerable passage of time.
Dogs can generally see better in poor light than humans . They have a wider field of vision than
humans because their eyes are set further toward the sides of their heads,
