When night falls and silence reigns, a long howl from a dog may suddenly be heard. Such sounds often raise questions in people, and in villages and small towns, the belief persists that a dog's bark at night may foreshadow disaster or indicate the presence of spirits. However, there is no scientific evidence that dogs see ghosts or that their howling is a sign of misfortune.
In reality, dogs can emit howling or barking sounds for many reasons related to their natural behavior and the surrounding environment.
It is not necessary for a dog to bark only at night. During the day, ambient noise can drown out its sounds. At night, when the atmosphere becomes calmer, a dog's bark travels clearly over a long distance. Furthermore, the canine auditory system differs from the human one: according to the American Kennel Club (AKC), they are capable of detecting higher sound frequencies than humans. Thus, a dog may react to sounds inaccessible to humans, creating the impression that it is barking without an apparent reason.
Howling or prolonged barking is a form of communication for dogs. If a sound from a dog occurs in another area, neighboring animals may respond to it. According to VCA Animal Hospitals, dogs can bark in response to other dogs' sounds or loud signals, such as sirens or music. Consequently, if one dog starts barking and others join in after some time, it may simply be part of their usual dialogue, not a sign of something frightening.
Dogs communicate not only with humans but also with each other through barking. Howling can serve as a way to inform other dogs of their location. VCA Animal Hospitals notes that even wild wolves use prolonged howling to communicate with other pack members. Part of this behavior is observed in domestic dogs; therefore, although it may seem like crying to us, it has a completely different meaning for the dog itself.
If a dog remains alone for a long time, it may bark trying to call its owner or other dogs. Some dogs suffer from separation anxiety. The AKC indicates that loneliness and anxiety can be causes of barking. Dogs experiencing separation anxiety, in particular, may make noise when the owner is away, and the nighttime silence enhances the audibility of this behavior.
Dogs are very attentive to their surroundings. If they sense the presence of an unfamiliar person, another animal, or any unusual activity, they may react with a bark. Some dogs may warn other animals that the territory is already under their control. VCA states that marking territory and warning other animals are among the reasons for barking.
If a dog is usually calm but suddenly begins to bark or howl constantly at night, this should not be ignored. As noted by the AKC and VCA Animal Hospitals, sudden or excessive barking can sometimes be related to pain or some physical discomfort. If this is accompanied by anxiety, loss of appetite, lethargy, difficulty walking, or a sudden change in behavior, it is recommended to consult a veterinarian.
Superstitions linking dogs to ghosts or impending doom are very ancient. One reason for such beliefs is that dogs react to sounds and movements that humans cannot instantly notice. The AKC also reports that in many cultures, dog barking has been associated with death or misfortune. Nevertheless, there is no evidence that a dog's bark can predict human death. That is, a dog may react to something that a person does not hear or see, but this does not mean it sees ghosts.