An improved animal feeder with an insertable feed restrictor. An example embodiment includes: a barrel into which animal feed may be deposited, the barrel including a first locking mechanism, the barrel being generally cylindrical; and a feed restrictor configured for removable insertion into the opening of the barrel, the feed restrictor being generally cylindrical with an open upper end and a round side surface, the feed restrictor including a second locking mechanism, the diameter of the feed restrictor being slightly less than the diameter of the barrel, the round side surface being configured to slide adjacent to an inner round surface of the barrel, the feed restrictor being configured to prevent feed extraction between the inner round surface of the barrel and the round side surface of the feed restrictor, the height of the feed restrictor being sufficient to prevent inversion of the feed restrictor while inserted in the barrel, the feed restrictor including a plurality of feed access holes arranged on
