A feeder for feeding animals selected from domestic pets, cage birds, chickens, fish and wild birds. Hydrophobic particles attach to bubbles in the fluidized bed and rise to the interface with the settling chamber where non-hydrophobic particles flow over the lip of an internal launder and are removed as tailings at. The sections may be positioned side-by-side such that the fluids’ flow is coplanar, or co-curvilinear, and non-intersecting.