I like this drawing, the eyes are the most remarkable thing of the for, highlighting the nose and expresión. It also highllights the ears, I think you should put more shading in some parts of the ear if you wanted that part hairless, but as foxes hace a lot of har inside thei ears you could have done it more hairy. The hair comes from the edges from the ears, and a little of the hair comes from below so in the middle it becomes darker. Sometimes the hair looks unclear, not very detailed and -for example in the belly- you can see the tool used. The brown of the back also looks quite fuzzy, there is color missing in some parts if you look there carefully. Also a part of the light-brown tool slipped into the fox's left ear. A good trick for drawing hair is coloring, shading a lot, lightening a lot and then using the dragging tool to make the hair effect but either way is good and looks good.
The background is simple, but in this case if fits the drawing as the main attention goes directly to the eyes and face, although you could have made it a less fuzzy below the grass.
The eyes look really good though, I really liked the expression looking at the snow.
Although it looks as if it is snowing, this picture gives a warm atmosphere. This little fellow's exquisite, furry coat looks soft and cozy. The shading and lighting especially bring out this feature. I also adore how his markings look a bit dull, blending in with his background, while his eyes remain a deep brown.
I like how you made him look curious about his surroundings, as well. It looks like something has caught his eye.~ The anatomy looks just about correct, although I am not sure if he is slightly twisting his body, while his rump is facing towards you. I would suggest you to darken his whiskers a tad bit (The set of whiskers that appear grayish.) It wouldn't hurt to put a little more detail inside his ears, too.~ Other than that, this is a lovely picture!
Randomly stumbled on your gallery and decided to take a look and my gosh, I think I mentioned it before, but you have an amazing painterly style. I really love how you play on your soft and hard edges to bring things forward.