A feed dish assembly for use in combination with a cage having a cage side formed as a lattice of horizontal and vertical members. The feed dish assembly includes a dispenser and mounting structure wherein the mounting structure includes a pair of elongated leg members having enlarged end portions. The mounting structure further includes a slide member having a pair of slots for engaging over the leg members wherein the slide member is retained on the leg members between the dispenser and the enlarged portions to retain the dispenser in engagement with the side of a cage with the leg members extending through the lattice structure.

A feed dish for use in combination with a cage. The feed dish has at least one or a plurality of protrusions or elongated members that are capable of receiving a sliding member in adjustable positions so that the feed dish can be mounted on cages comprising on cage walls having different widths, thickness or sizes.

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.