[foxxbreath]

k so im not super good at realism or anything but a few tips i guess??;

the shape of your eyes were really good! nice and round, but maybe make them a little bigger and more "symmetrical" i guess? Its hard to do but can be done <3
foxes have narrow/long noses, but from a front view it shouldn't be the main feature on the face i suppose. don't be afraid to fill out the muzzle and stuff!
also rounder nose! unless it's just your style to do it the way you did <3

slightly bigger, rounder ears. in a head-on view(like the drawing) the inside of the ears, inside corner of the eyes, and side of the muzzle will all line up so that's something to keep in mind as well! They also have v round faces. and where the ears meet the head make a little divet between them it looks like

hmmmmm and be careful about making the eyes sink in too far, but thtas not really a big deal ;0

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but some of these things can very with style. I personally add a lot of fluff to my fox faces even if they dont really have that much, my noses are generally very triangular and pointed, as well as my ears(not to mention long). but i assumed you were going for realism here so thats what i tried~
if you need a better explanation of anything i said here lemme know!

[cookeil]

This was very helpful, thankyou so much!!!

[foxxbreath]

This was very helpful, thankyou so much!!!
:D

Not a problem, glad I could help!

And again, sorry if the explanations aren't super clear cx I hope they were tho~