v1.72 Stalker
After I headshot the bear with a revolver, I passed 2 hours outdoors. It died of bleed out.
At another time, I entered the cabin shortly after I headshot the bear with a revolver, I passed 2 hours indoors. The journal's stats "Bears killed" was 0, but it groaned and died as soon as it went outdoors.
The number of crow feathers around carcasses is random.