1. All three. Direction of the lighting perhaps? The shadows is off as I see it.
You have bright sources of light behind the subject. Yet the subject is fully visible in front.
Two sources of light can be confusing without something explaining a second source.
2. Second and third images. The background details is a bit too blurred. I know you want to emphasize the subject though, so don't unblur the background too much.
In fact in the first image, your background right side wolf has more detail than the tree in front of it on the far right.
3. In the first image the right side wolves look out of place. No context for the placement. Middle wolf is almost on top of the foreground wolf. Also larger.
Try to put a context like in the left side wolf.
4. Q: Is there a reason for four wolves? Understand if it's apart of the request.
