In October, 1983, I was painting Van and Juanita Clarks home. They had a small black dog who would go to the back door and bark and bark until someone finally got the message and let it out. One day I was there, painting the outside of the home, while everyone else was gone. Their little dog, however, took up his station at the back door and barked incessantly all day. The sad thing was that it never dawned in his little brain that all his barking was totally uselessno one was home to hear!