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 slotted lip with a plurality of notches at an upper opening of the barrel； and a feed restrictor configured for removable insertion into the opening of the barrel, the feed restrictor including a round side surface including a plurality of nubs, the feed restrictor including a plurality of feed access holes arranged on a lower surface of the feed restrictor, the feed restrictor being configured to float on top of the animal feed deposited in the barrel, the feed restrictor being further configured to freely spin laterally in the barrel, the feed restrictor being further configured to lock into the barrel when the plurality of nubs on the feed restrictor are mis-aligned with the plurality of notches on the slotted lip of the barrel.
