If the dog is a new one, especially a puppy, they may not have fully adapted to the new environment and may feel lonely or scared, so they may bark to express their uneasiness. The dog may not have enough activity during the day and may bark due to excessive energy at night. This usually occurs when the owner does not spend time with the dog or take it out for various reasons.

Dogs are social animals and crave the attention and companionship of their owners. If they feel lonely or need the company of their owner, they will call to attract their attention.