a great vector! but watch out for those unecessary pointy nodes/anchors like on her visible hock. This is easily fixed by straightening the "handles" of the node/anchor point, giving it more of a curve.
Watch out for funky angled points like the one in her "middle hair". Between the thin hairline and the purple streak in the middle...It's a bit off :] Easily fixed with more "handle" tweaking, and width adjustment (like what you did with the points of the leg.
And speaking of legs, unless you like it this way, the line extending from the foreground hind leg into the body is MUCH too thin for my liking. I would've fixed it, but that's your call this time.
Anyway, MAGNIFICENT vector, and I'm lovin' the the way to placed the horn! Keep it up!