Abstract: An animal containment apparatus (10) adapted to be mounted to a fencing arrangement (32) or building structure, the apparatus (10) including an elongated prop member (14), pivotally supported (34) about a length of the fence (32) or building structure, having an outer peripheral edge separated by intermittent ingresses along the length of the prop member (14), such that when the paw (30) of an animal (28) makes contact with the prop member (14), the paw engages an ingress, causing the prop member to rotate and preventing any leverage for the animal (28) to climb or scale over the fence (32) or building.