This black and tan Coonhound has got no excuse for not hearing when he's called.Why? Because he's got the longest ears of any dog in the world! Eight-year-old Harbor's left ear is 31.1cm long, while his right ear is even longer, at 34.3cm.They've made him a bit of a celeb in his hometown of Boulder, Colorado, but having such big ears isn't easy.As a puppy, he used to trip over them and roll down the stairs, and these days he gets a LOT of attention.