Fig. 1

Performances and sanitary status of the mothered (MOT, grey box) and artificially reared (ART, white box) lambs. Average daily gain (ADG) (A), welfare score (B) and serum IgG concentration (C) of the two groups of lambs. B: Mixed-effects model (REML) showed an effect of rearing mode (p < 0.001) on welfare score. The differences in the two groups were found significant at week 1 (p < 0.05) and 5 (p < 0.005) (Bonferoni multiple comparison test). C: Mixed-effects model (REML) showed effect of age (p < 0.0001), rearing mode (p < 0.05) and interaction between them (p < 0.05) on IgG concentration in serum of lambs. Sidak’s multiple comparison test indicated that MOT IgG were higher than ART IgG at day 2 (p = 0.005)