I prefer this one over the one with the bullet wound (?), it gives it a completely different message. And this one feels deeper. I like how you made the colors of the light still seem varied even though your background is filled with neutral atmosphere.
I like the detail level of the head (looks very realistic to me) and the choice of colors which matches the style. The rest of the body as well as the scenery doesn't matches the skill level of the head for details and contrast are less well made (especially at the hands and feet). There are also some anatomical issues - hands are too large in comparision to the torso, the torso and legs are very long and the shoulders/chest are not wide enough in comparision to the head. The composition lacks also a bit of dynamic for the character is placed exactly the middle of the picture - it looks to balanced and calm to me, but this is more a matter of taste I guess.
The blood provides a little more narrative and mystery to the image, but provided that the wolf is already approaching a deadly fate, it seems redundant.
Looking at this current pic, it somehow appears peaceful and gloomy at the same time. Thanks to the upright pose and lighting, versus the subject matter and the grays at the bottom, respectively. Without the blood, the circumstances feel like they're more internal, like guilt you have to live with after making some horrible choices. Or a mental breakdown. Either way, this piece captured my attention