<br> <br> <br> <br> Probably the most common service is assisting the blind. They are trained to assist the blind to cross the street, go through doors, and to go around challenges. The blind person's job is to provide directional commands, which the dog might or might not comply with depending upon the situation. The pet will pick to disobey the command in order to guarantee the person's security if a hazardous command is given. In this case the pet need to have great judgment and be an independent thinker.<br> <br> <br> <br>