A feed chute for dispensing to a first kind of animal but rejecting a larger muzzle and tongue of a second kind of animal. A gate is hinged to a first shorter side wall such that the gate forms one side of a dispenser end of the chute when the gate is fully-open, sufficiently large to accommodate a muzzle of the first kind of animal. The gate detente determines a closed position of the dispenser end. When the second kind of animal attempts to access the feed, its wider muzzle urges the gate towards the fully-closed position, which is sufficiently small to prevent entry of the second kind's muzzle and tongue.