Glad everything turned out. It is amazing how protective our loved animals get.
I have a large Blue Great Dane who is in heat this past weekend. I locked her in the 3 season room as there had been undesirable dogs around the pen area. Came home to find a pit / Sheppard mix in my house. It had pushed the outside door open (my wife left it cracked a bit) and broken through the screen. My wife went to open the door and the dog would not leave. My wife picked up a broom to try and get the dog to run for the now open door. The moment she picked up the broom, the dog started snapping, growling and coming towards her. I realized if this would have been a person who broke in and started coming towards my wife I would not hesitate to shoot. Threat was eliminated immediately.
I love dogs, but there is no excuse to have an aggressive, untrained, free roaming animal. Glad it worked out better for you.