Abstract: A brisket barrier for milking parlors includes a transverse bar mounted for sliding movement on vertical supports. The bar has a release position at floor level, a retaining position at brisket level, and an index position where it presses rearward against the brisket. The arrangement provides for uniform positioning of cows in standard stalls, regardless of the cows' size. The cows simply step over the lowered bar to exit the stall.