Simply Sharp - portrait of a Thoroughbred mare

My next commission is a pastel portrait of an English Thoroughbred mare called 'Simply Sharp'. She is one of 4 Thoroughbreds (all related - apparently, 'Sharpo' is a well-known racing horse) that I will be drawing for this client, including Simply Sharp's young son 'Sharpolino', and two others called 'Otxoa' and 'Carlitos'.

So this is the draft of Simply's portrait that I just completed: