Dogs’ running can express their moods and emotions for the following reasons: 1. Dogs stay indoors for a long time and after being taken out, they will release stress and enjoy freedom by running; 2. Dogs see something they like When a human is in an excited and happy mood, he will run wildly to express his feelings; 3. A young dog running wildly back and forth is a sign of being full of energy and consuming energy. Therefore, it is normal for dogs to run wildly back and forth, and owners do not need to worry. If they are afraid that it is not safe to run indoors, they can take them outside for a walk.