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You Growl Like A Big Dog: Dogs Can Estimate Size from Vocal Sound

It is well accepted that dogs, like humans, use specific vocal sounds to convey information. Barks, growls, whimpers and other vocal signals, give nearby individuals information about what the dog is thinking, feeling, and intends to do. Sometimes vocal information used by dogs can carry quite specific information, as demonstrated by Péter Pongrácz, an ethologist at Eötvös Loránd University in Hungary, and his colleagues.
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