Alternately, or in addition, you could put an " out-of-order " sign over your doorbell to prevent its use altogether. [substeps] Your dog might also be afraid of or agitated by a knock at the door.
[header] How to introduce a new dog to visitors [title] Ask your visitors to call you instead of knocking on the door or ringing the bell. [step] The sound of an arriving guest might upset the new dog. Therefore, you should ask all potential visitors to call you before they arrive at the house.