Six year old registered Thoroughbred mare. Say what you feel. Note - up until August 2010 she had never been outside of a stall. She has bad feet because of this and swollen knees from growing on cement/no movement. She was thin and due to having been thin, only stalled and currently un-broke I am well aware that her back end could use some muscling up.
Probably the best photo to critique from:
Standing down hill here: