What does it mean to "wash chicken" on an auspicious day in the Gregorian calendar?

⑥ Wash evil spirits every day: for example, "Wash monkeys and be afraid of the north at the age of four" and "Wash chickens and be afraid of the west at the age of four". "Chong" means that the earthly branches collide with each other, that is, the meridian, ugliness, Shen Yin, You Mao, Chen Xu and Hayes, and then the twelve earthly branches are matched with the zodiac, that is, the mouse, ugly cow, yinhu, maotu, dragon, snake, afternoon horse, sheep, monkey and unitary horse. Therefore, every Children's Day, and the rush at noon, are "running horses"; Yin, Shen, that is, "Running Monkey", is set up in this part of the yellow calendar to tell people not to choose those days that conflict with their genus. The old monster who often lived in Four Seasons became "Four Seasons Yin Qi". It is extremely vicious and can travel in the sky. It is forbidden to drill in situ, repair camps and move. If you accidentally violate this point, your descendants and livestock will be hurt. However, the location of the old evil spirit is easy to find. From the second day, due south, retrograde east, one person a day, four days a week, and so on.