Behavioural differences between pups nursed by wild-type dams and pups nursed by α-casein deficient dams during the lactation period; days of assessment: 1, 3, 7, 14 and 21.

<p>Significance level p<0.05 for Fisher's exact test. Y = yes, n = no, ns = not significant, norm = normal, consp = conspicuous.