Complex sentence: The men find her the next morning barely alive; they try a transfusion, but by this point it's much too late, as the bite marks on her throat have vanished and her teeth now sport longer canines.
Split into simpler sentences: The men find her the next morning barely alive; they try a transfusion. But by this point it's much too late, as the bite marks on her throat have vanished and her teeth now sport longer canines.