The point AirRaiser is trying to make is that you aren't giving an artist much to work with. Your avatar is so small you can barely see anything, so how is someone supposed to know what your fursona looks like just based on that?
So either post a larger version of that image, give a more thorough and detailed description, or you can take one of the free line arts from the thread AirRaiser linked to and color it yourself *just for the purposes of having a better reference for an artist*.