WIP in appreciation of good C&C

[swizec]

This is a WIP of a painting I'm doing as a christmas present for my sister, she likes horses and funny cartoon characters and also loves dynamic things because she's a sports person, so I though she might like a painting like this.

The guy is pretty much finished I think and the carriage needs to have the side done. The horses in the front are the main part of the image and I would really like some good C&C on their anatomy because this is my first time drawing horses. I know it's difficult to comment on rough sketches but I'd really appreciate knowing anatomy flaws at this stage when they're still very easy to fix.

http://swizec.com/meh/Screenie2_.png (http://swizec.com/meh/Screenie2.png) <-- clicky

Thanks for the comments :)

[MephistoLV]

The angle from which this scene is presented has me very confused. Is the viewer supposed to be a giant with his head tilted way over to one side? Is the little man falling or is his hair blowing in a stiff breeze? Also, the man does not seem to be occupying the same perspective space as the horses.