Complex sentence: Roasts are solid joints of meat (and sometimes fowl) other than feathered game, usually spit-roasted but often baked; game is feathered, rather than furred, spit-roasted whole and served rather simply.
Split into simpler sentences: Roasts are solid joints of meat (and sometimes fowl) other than feathered game, usually spit-roasted but often baked. Game is feathered not furred, spit-roasted whole and served rather simply.