If you email the Preserve at: info@cosumnes.org they can fill you in on that. The CDFW does some limited hunts on areas of the Preserve, but the majority of land is designated as an ecological reserve, so there is no hunting unless you participate in a scheduled, limited hunt by CDFW.
Thanks so much for this update. It would be good to have some info posted at the Boardwalk kiosk, also. Today's photos: www.flickr.com/photos/20198552@N06/albums/72157716603403222