There may be several reasons why dogs are afraid of the dark: Most dogs are wanderers in nature, so they may feel more vulnerable to attack in the dark. In the dark, dogs' visual abilities are limited, so they may feel helpless.
Sounds in the dark may scare dogs because their hearing is much sharper than humans. Some dogs may have had unpleasant experiences in the dark, so they may find the dark night scary. If your dog is afraid of the dark, you can help them overcome this fear by providing a sense of security and comfort. You can also try providing them with some light or using a pet flash to help them see their surroundings.