One of the reasons why dogs are the man's best friend is that they are unbelievably able to feel of their owner's mood.
The dogs are very sensitive to the surrounding atmosphere, that's why they sit next to us in quiet when we feel blue and they frisk, run with baying if we are in a very good temper. They have amazingly refined sense of time.
They find satisfaction in training, learning without reference to their breed, size or age. They have to understand the training as the continuation of the playing; their learning ability is based upon the thought-association.
The dog is a true and grateful friend of man. According to the high intelligence of some breeds their helpfulness can be used for our interest. They wish an owner, a master and want to be loved.