Dogs Can Hear How Big You Are

Lots of animals are well aware that bigger means scarier. In stressful or aggressive situations, for example, the hair or fur of chimpanzees, rats, cats, and even humans stands up on end (in humans, given our lack of fur, this results in goose bumps) in an effort to dissuade a potential attack. Elephant seals use a display called “rearing up” to make themselves look bigger – as if they need to look bigger in the first place!

Since some animals tend to be good at looking bigger than they truly are, visual cues may not actually be a reliable method of sizing up another individual. In addition, using vision alone to determine body size is error-prone due to distance and visibility. It would seem prudent, then, that some animals would need an alternative mechanism to use in determining body size. It seems as if domestic dogs have just such a method: they listen.

Full article at The Thoughtful Animal