Gem said:

Hi!!

I really love the pose of this one and the composition is just perfect. Plus all of the little details are so cute!!!!

My main issue with the piece is the colors. Looking at the background itself, it's super colorful and bright and saturated. However, the horse doesn't match this. I think the face works with the lighting but the abdomen and flank of the horse just seem so desaturated in comparison. I went and stalked through Nat's barns to find the girl and it looks like she's an Amber Champagne. In the piece, the colors look almost palomino-esque because you've emphasized the yellow tones rather than pinks or purples. If I was you, I would add a Soft Light layer above the horse and just add a whole bunch more color. Pull shades from the background and just airbrush over the horse with some super bright pinks and purples and blues. I would suggest sticking to cooler tones in the shadows then warmer tones in the highlights. Should give you something like this...

Will come back and write a bit more later...

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