Apparatus 10 for mixing and supplying feed materials for animals comprises a tub 13 having a peripheral wall defining an open top 13A into which the feed materials can be supplied for mixing and a base 13C, and at least one mixing auger 14 mounted in the tub 13 so as to stand upwardly from the base. The mixing auger 14 has a rotatable upstanding core member 15 that carries a peripheral flight 17 for rotation about an upstanding axis of the core member 15. The tub 13 has at least one adjustable restricting element 20 on the peripheral wall positioned at a height on the peripheral wall aligned with the mixing auger 14. The at least one restricting element 20 extends inwardly from the peripheral wall so as to engage and restrict movement of the feed material as the feed material is carried around the peripheral wall of the tub 13 by the mixing auger 14. The restricting element 20 has mounted thereon a magnet 30 for attracting and collecting metallic materials in the feed materials.
