Dogs and young children can have a very unique bond, which is easily demonstrated in this video. The boy is howling at the start of the video, and his pet German Shepherd manages to join in the fun. Neither of them show the least bit of self-consciousness. The boy howls, and then the German Shepherd starts howling. The two of them make quite a pair, like they’re two members of a pack.
The German Shepherd doesn’t appear to be howling for any functional reason. He just knows that there is howling nearby and sees no reason not to participate. The two of them seem to be using this as a fun bonding process, and now it is a moment that can be easily immortalized forever.