A feeder apparatus comprises a plurality of walls defining a feeder body, mounting structure, and a feed holder. The feeder body is hingedly, optionally hingedly and/or removably, mounted to the mounting structure. In some embodiments, the feeder apparatus further includes a blocking plate which is hingedly, optionally hingedly and removably, mounted to the mounting structure. One or more of the feeder body walls and the feed holder have cooperating sliding structures, enabling the feed holder to be slidingly received into, and/or removed from the remainder of the feeder apparatus.