Two things I notice:

I would work on manes and tails, getting some more flyaways, and movement in them, and more defined strands

Secondly, your work with patterns is amazing, the only thing I would experiment with is adding a mid color between the white and the base color (like an outline), or maybe smudging where they meet so the contrast isnt so stark.

I think your work is lovely, dont give up <3

We all get in a place where it feels like we've plateau'd, and you just got to push through it