All dog owners know about situations when your pet suddenly looks “into nothing” and starts barking as if he sees something you don’t see. What is it about?
Many people think of some paranormal phenomena, but it is not about that, but about the reaction of dogs to smells and sounds that our senses cannot register. The dog’s sense of hearing also reacts to ultrasonic frequencies, so it can react to, for example, some quiet sounds that you cannot hear.
As for the smell, the sense of smell is even more pronounced in dogs, and it can smell the presence of another animal that is very far away. This can be the cause of their barking, without us knowing anything about it because we neither see nor smell that animal.