I don't know of any studies that directly compare
the hearing of wild and domestic dogs. I suspect
the reason why there is so little research into
that is because most scientists assume that their
hearing is about the same.
Dogs evolved their
amazing sense of hearing because it helped them
reproduce more effectively. For example, better
hearing might have enabled a dog to hear predators
coming at greater distances, it might have allowed
them to find more prey to feed to their puppies,
or it might have let them hear new mates who were
so far away that other dogs couldn't hear them.
All of these things would let a wild dog with
better hearing produce more puppies.(Remember that
in evolution, reproduction is the only thing that
matters.Survival is only important because it lets
you reproduce more. A species in which all the
animals survive to old age but never reproduce
will go extinct.)
That's how wild dogs got
their great hearing, then humans came along and
domesticated some of those dogs. Humans have used
selective breeding to exaggerate different traits
in different breeds of dogs: Dachshunds forgetting
into rat holes, greyhounds for running fast, etc.
I've never heard of anyone breeding dogs to have
worse hearing, and I can't think of any
reproductive advantage to a domestic dog losing
its great sense of hearing.So, I suspect that
domestic dogs can probably hear just as well as
wild dogs. Excellent question!
Check out this
web-site for a diagram of a dog's ear: dog's
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