A latch assembly for a gate or a stall which houses animals including a keeper of metallic bar-like material having a curved upper end and a straight central portion, spacers on the straight central portion for spacing it from an associated door frame, the spacers being dimensioned so that the curved upper portion of the keeper produces a predetermined space between it and the frame, a latch consisting of an elongated substantially rectangular bar of metal having a thickness which is less than the predetermined space between the upper portion of the keeper and the frame so that the latch experiences a frictional engagement when passing through the space, and a pivotal mounting for pivotally mounting the end of latch on the door or gate, with the spacer of the keeper serving as a stop for the latch when the latter is in latched position.