UCN2 and Anorexia: In the 3-month-old group, this decrease lasted for 9 days (repeated-measures ANOVA p = 0.02), in the 6-month-old group, the decrease remained significant throughout the 14-day observation period (p = 0.003), in the middle-aged, 12-month-old group, the Ucn2 failed to induce anorexia (p = 0.116), and in the 18-month-old group, the Ucn2-induced anorexia for 2 days (p = 0.024) (Supplementary Figure S1 and Table S6).