Effects of repeated, alternating 5-day access to chow and 2-day access to either chow (Chow/Chow, n = 16) or highly preferred chocolate-flavored sugary diet (Chow/Preferred, n = 14) in female Wistar rats. Panels show (M ± S.E.M.) (A) average daily food intake, and (B) food intake of Chow/Preferred rats within C (Chow) and P (Preferred) diet phases relative to chow-fed controls. Symbols indicate significant differences (p < 0.05) from *Chow/Chow, &0, †C (Chow) phase of Week 2, €P (Preferred) phase of Week 2, or §respective C (Chow) phase.