Dogs of different breeds react differently to the absence of their owner from home, but an approach can be found for each of them.
For example, Chihuahua owners should not leave their pet hungry – the feeling of satiety will help reduce the level of anxiety. However, since irritability occurs in everyone due to low blood sugar, this advice applies to representatives of other breeds as well.
The next thing to do is to go through a desensitization process with your pet. Since you usually use the front door to leave the dog, the dog begins to have a negative attitude towards this “portal”.
This is the reason why you should contact a dog trainer - he will help the dog stop being afraid of the front door and considering it a threat.
Owners who have hunting dogs with a good sense of smell in their family should tire their pets out properly before leaving – not only their bodies, but also their minds. Smell games (find a treat, etc.) are perfect for this purpose – as a result, the dog will become less anxious and will relax before you leave.
Large and energetic dogs like greyhounds need a lot of attention: don't even think about leaving them alone without first taking them for a walk. After a warm-up, dogs will be happy to rest at home, and you can calmly go about your business.
Finally, experts advise calling for help sounds that can calm any anxious dog.
You can turn on radio stations or multi-hour playlists designed for dogs, the main thing is not to force your pet to listen to the same thing all the time.
For reference
A dog is a domestic animal, one of the most popular (along with a cat) companion animals.