Bill is the pony that Sam bought from the corrupt Bill Ferny when the four hobbits’ ponies were stolen. Bill’s service to the hobbits was so valued that when Sam learns Bill returned to Bree on his own after being set free at the gates of Moria, he asks to be taken to see him immediately. Bill plays a small but significant part in liberating the Shire from the ruffians by kicking Bill Ferny in the backside.