Fig. 2. Body mass (A) and food intake (B) of shaved (N=20) and unshaved control (N=20) mice during lactation. Double-headed arrows indicate period when dorsal fur was removed to increase heat loss capacity (days 6–18 of lactation). Body mass (A) and food intake (C) of non-reproductive shaved (N=8) and unshaved control (N=8) mice are also shown. ^*Days with significant differences between shaved and control mice of the same reproductive status. Values are means ± 1 s.d. Filled symbols, shaved mice; open symbols, unshaved control mice; circles, lactating mice; squares, non-reproductive mice.