well i am not entirely sure what you mean by "the best ears" but dolphins and bats have the best sonar hearing and owls have the sharpest hearing with one ear hole above their eye level and one below they can pinpoint the vertical positions of a sound source. :)
well actually,all animals eat with their ears,non of them eat without them! but a serious answer wud be bats.they rely upon their sense of hearing to catch insects.
Although some of the physical structures of animal ears are similar to humans, the hearing range of the animal causes their ears to work differently.
circumvolutionary ears
the animal with the biggest ears is probably the elephant
cougar
antsojikoj
it is animal are more got better hearing then human
a elephant
i have no time to answer this question
Big ears!
a human with animal ears and tail
Usually you can tell by its tail or ears
Tail and Ears