The pattern often begins with a sound, movement or expectation, followed by barking, rushing or jumping, and then a consequence that keeps the behaviour going. The consequence might be the visitor stepping back, the owner opening the door, or the dog gaining access to the hallway.
A useful training plan examines that whole sequence. Before changing commands, note what happened in the few seconds before the reaction, how intense it became, and what the dog gained afterwards. Those details usually provide a more useful starting point than a louder voice.
