Prairie voles injected with MTII from PND1-7 weighed less than saline controls on PND2-7 (A), which was normalized by weaning at PND21 (B). Although not empirically quantified, daily MTII led to fur darkened pigmentation in neonates (C, left Sal, right MTII). Darkened pigmentation from early MTII injections was still observed at weaning (D, left Sal, right MTII). Asterisks in A indicate post-hoc Student’s t-tests with p<0.05