cover it with dirt: This rule stopped hunters from using an animal's blood for food. Like the blood in altar offerings, the blood of wild game also symbolized life. Uncovered blood was a sign of violent crime. Innocent blood defiled the land (Numbers 35:33). It called out to God for justice (Genesis 4:10; see Job 16:18).
Covering the blood of a killed animal gave it a symbolic burial. This showed respect for both the animal's life and for God, the giver of life. The burial showed that the life was returning to God. This was similar to how the priest poured out the blood at the altar during offerings.