That's a sweetass horse you drew there. The anatomy is quite correct I would say, even if I haven't studied horse anatomy. =P
Also that char design...I may be misreading it, but his face (I'm assuming that's a boy) looks kinda girly. Unless that's what you're going for, in which case props. I'd say it's turning out fine so far.
That portrait...is it from reference? I love the detail you've put in it. It looks flat though, but I guess it is not finished.
yea he is suppose to be a bit androgynous although his body does not tell it as much,
and vilppu http://www.vilppustudio.com/redesign/index.htm in his store there is like a wealth of knowledge, currently going though the drawing manual series, pretty good stuff~