An arrangement and a method for indicating an undesired detachment of a milking member from an animal in a milking stall. The arrangement includes a removing device adapted to detach the milking member from the animal and move the detached milking member to a parking position when the milking process has been completed, and a supervision device adapted to supervise when the milking member has been detached from the animal before the milking process has been completed. When the milking member has been detached from the animal before the milking process has been completed, the removing device is adapted to move the undesirably detached milking member to an indicating position located at a distance from the parking position.