There is a big dog on the roof in front of the house.

Generally speaking, it's good for you, and it can prevent villains. However, it can lead to head discomfort, insomnia and dreaminess at night. To resolve it, you can write the word Fan Kuai on the wall facing south, and then draw a knife, so that it can be contained. You can also observe it slowly, and its spirit will gradually weaken and listless, so you can erase the words. Give the dog a break and don't start your own business.