Abstract: A cage for small animals includes a generally closed base having an open top; a grating structure upon the base forming a closed structure for containing an animal therein; and a refuse catcher surrounding the grating structure and removably fastened to the base so as to permit the refuse catcher to be removed from the base by being detached from the base and moved upward away from the base without removing the grating structure from the base. The cage can be a bird cage, wherein the refuse catcher is a seed catcher that is formed of a plurality of mating parts, the parts being releasable attached to each other and to the base.