Feng shui, can the ancestral home dig out snakes?

There used to be an old house in my hometown. There is a big hole under the threshold, and there are two snakes in it. Mr. Feng Shui said that there are two dragons to protect the Lord and come up with talents. There are two sons in that family, both of whom study well, but neither of them has been admitted to the university. It is said that one year his second child set off firecrackers during the Chinese New Year, poured a lot of gunpowder into the hole, blew it up, and the threshold soon collapsed.