Dogs can tell the size of another dog by listening to its growls.

In fact, dogs’ growl detection abilities are so good that, in an experiment, they were able to match the sound of another dog’s growl with a PHOTOGRAPH of that dog. This is a cognitive ability so complex that it has only previously been observed in primates.

Dogs also can detect the intent of a growl. For instance, there is a distinct growl that dogs use when they are protecting a bone that they don’t want to share.

To learn more about this exciting experiment and its findings, check out this article.

Another interesting dog fact: Studies suggest that when dogs encounter something unexpected or new they respond by looking to the left.


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