JULY 1924–NOVEMBER 1929: FOLLOWING DR. MANFRED'S ACCIDENT, MANHATTAN TERRIERS EXPERIENCE A MASS DIEOFF ACROSS THE WORLD. PREVIOUSLY HEALTHY INSTANCES SUFFER CARDIAC ARRESTS, STROKES, AND OTHER AILMENTS. FEMALES ARE UNABLE TO PRODUCE VIABLE OFFSPRING. BY 1 FEBRUARY 1926, THE ENTIRE BREED IS DECLARED EXTINCT.