hearing

They perk up when interested, they droop when sad, they fold back when threatened. Even if they had no useful function for hearing, ears are as much an outward sign of a dog’s mood as their tail. But of course, they’re also remarkable hearing devices. Dog ears are far more sensitive than human ones, and they’re capable of hearing at a higher frequency. Because dog ears are so good at bringing in the outside world, dogs rely on hearing even more than on their eyesight.