Dogs pick out faces of other dogs, irrespective of breeds, among human and other domestic and wild animal faces and can group them into a category of their own. They do that using visual cues alone, according to new research. Their work is the first to test dogs' ability to discriminate between species and form a "dog" category in spite of the huge variability within the dog species.
URL: http://feeds.sciencedaily.com/~r/sciencedaily/plants_animals/dogs/~3/qzrCZo7uz-k/130214103703.htm
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