Grrr… what's 'Step away from the bone' in dog? - life - 08 March 2010 - New Scientist
If you are a dog owner, you probably think this is a pretty silly experiment. As the owner of two canines, I can tell the difference between the growls of my two pets. And they can really tell the difference. When one dog is angry at the other, he has a really low and scary growl and the second dog backs away. And the second dog will give out a high pitched bark as if to say, "chill out-I'm not going to take your food."