Concerning the painting itself (and most of all, the technique involved) I feel utterly unable to write a critique in its traditional sense, wherefore I will turn it into a hymn of praise instead:
The hedgehog is wonderfully framed in this piece of work, not only by making it the central point - the eye turned to the audience almost directly in the centre while the snout points down as if just casting a quick glance upwards before continuing to rummage (thus adding action) - but also by surrounding ti so beautifully with the fallen autumn leaves. The shade of the leaves is soft enough to have the pricks with their stark white reflections stand out just enough without breaking the ranks of the entire composition. Not even to mention the details in the fur, the nervures and the hedgehog's expression - as if raising an eyebrow. All of this added up to the five stars in technique.
As I am also certain that this detailed piece will inspire other artists to emulate your deeds, I gave you four stars for the impact.
Now to the ratings on vision and originality where I retracted a few points: Firstly, I could not determine whether you used a reference photograph and if so whether this was one of your own or provided by somebody else. Secondly, while the technique is flawless to a fault in reproducing reality, I miss the detail that raises it beyond and above a reproduction, something inherent to the drawing that would distinguish it from the photograph other than the dedication that is certainly visible in every stroke.