An unexpected visitor can be a big source of anxiety in dogs, so having a well thought out plan of action is essential to help your dog cope and allow you to enjoy your visitors.
You may already be aware of what kinds of people https://aminocalm.nl/vuurwerk-geluiden-2/ trigger your dog's anxiety. Dogs can feel anxious around specific groups of people such as children or men or may have a generalised fear of all strangers. Being aware of what triggers your dogs anxiety will make it easier for you to know when to take action, so keep a careful note of when they get anxious and look for the patterns.
An anxious dog may react to a visitor by acting shy or scared, for instance staying close to you or standing behind you. They may also cower under furniture or even go into hiding. At the other end of the scale, an anxious dog can react to visitors with nervous aggression and bark loudly or even try to snap at them or bite them, so be aware of what dog anxiety symptoms your dog is likely to show.
To make sure it is a positive experience for your dog which encourages them to be more confident, enlist the help of your visitors. Ask them not to look your dog directly in the eye as this will be seen as a challenge. It may also help if your visitors know not to make any sudden movements or loud noises.