I just went to a site that says they look better after dubbing...I guess it is like trimming a dogs ears......very painful. But you you have too for health purposes then you just have too. Here is the site I found, but they do it just for "looks" it seems.
http://www.slipspurbantams.com/Dubbing.htm
http://www.slipspurbantams.com/Dubbing.htm