Dead sheep.

They push a sheep in to the room. The light from the doorway is bright and makes you squint. The sheep is confused and takes short, cold breaths. They shoot it in the legs and the belly. The sheep collapses, buckling under its own weight. The blood steams as it runs out of the wounds. The shut the door again. The sheep makes gulping noises as it swallows blood. You realise that the sheep could keep you warm. It is too weak to struggle so you pull its legs over your shoulders and push yourself in to the woollen mass of its body. It breathes in your ear and blood drips from it's mouth, clotting quickly on the cold floor.