If this bone belongs to an animal, it has nothing to do with people being stained with blood.
If this bone is human, it depends on how many people died.
For a long time, if decades, this situation will be more complicated to analyze, always
Not good for the dead.
If you have just died for a few days, it must be good for the soul of the deceased to be soaked in blood.
Damage. If you put this bloody bone on the victim's grave again,
Then the soul of the deceased will be restless and will be serious to the people you love.
Have an impact.