The invention relates to a feed barrier (2) for animals and a locking device for such a feed barrier, comprising a left and a right post (25, 26) bounding a feeding location for an animal, wherein the left and the right post are rotatable about a first and second centre line (27), respectively, between an open and a closed position, and wherein the left and the right post have a curved shape, wherein a part of the left and right post in the open position are bent away from each other in order to form a passage for the animal's head, and in the closed position are bent towards each other according to a shape substantially adapted to the shoulder blades and/or neck of the animal.