One of your most solid pieces every, I think. Great colors, anatomy looks pretty solid from here (though i'm no horse expert), nice bg...
Issues I have: I'im wondering if the perspective is right. AtT least, when I look at the feet of the colt, combined with the tree/tree root, I get a little confused, like it doesn't match up as well as it should.
Also, the story could be told a little better (the thumbnail wasn't very clear, until after I read your description, and even then, one could be confused with the closeup)...but you already said you knew this, so I'm babbling..
Really nice stuff, dear. Email me more, will ya?
my art: www.talanyn.com
Awwww! The foal (particularly his/her face, so expressive) is adorable! And, I really like your handling of mixing the two media. Especially on the foal and the tree. They're simply lovely to look at.