by emotions?
in fact, my dogs have always been a mirror to my emotions. when i'm happy, they are happy and when i'm stressed... look out. it's much easier to see now than it was years ago.
back when i had 5 big dogs and i came home from work stressed (i was working 6 or 7 days a week at the time) here are some of the things that happened. surely you can guess which were caused by physical stress from lack of exercise and which was trying to get me in a better frame of mind.
and if any humans got into a heated argument? dogs always, always always stood between 