I can't say I wasn't there but I think maybe the deer layed down in the dirt and it may of helped to clog the hole.I have heard that they try and study how a deer when wounded can have their blood clog so fast.I hear out of any animal they can heal as quick as any.Some hunters think a deer is smart enough to go to water to heal a wound when most times it is because of the fever from the infection or wound that brings them to water.