First Impression - the most important one: hmmm .. blurry ... and blue .... neither which seem to work with this shot.
Composition: the top of the saddle lines to the horizontal thirds (this is good) ... the stirrup his the vertical thirds .. this is also good ... I would probably have cropped a little wider ... as it seems slightly too tight at the moment.
Subject: Meets the challenge in some odd ways.
Technical (Colour and light): Ok ... get a tripod .. and don't be like me .. USE it ... I think that some of the blurring is camera shake .... have a look for neat image they have freeware available and this may hel with some of the grain in the shot, and try reducing the blue channel slightly in the colour balance.
To grow its vote?: Take another shot ... and try applying some of what was said in the processing .. I think this is just the learning phase you are in right now .... you are still doing ok.
Summary: Good work ... keep praciticing .. it will happen.
If you've got any questions about this critique, please feel free to contact me via the PM system.
This could be interesting if you play with it some more (perhaps cover the rack with a blanket under the saddle, and add something leaning against the saddle) and if you improve the focus.