An animal feeding apparatus includes a duct through which feed falls under gravity. A drive wheel is mounted in the duct and includes a plurality of paddle blades such that falling feed in the duct acts to drive the blades to rotate the wheel about the axis. A syringe is laid in a support channel where a plunger of the syringe is compressed longitudinally for feeding a liquid to an injection nozzle into the duct by a screw driven by the wheel. The wheel and the support channel are mounted on a common housing forming the duct and containing the wheel, to an injection opening on the bottom of the housing for addition to the feed passing through the duct portion.
