Figure 3.

Non-agonistic contact was compared across four time points using least square means regression analysis. Pigs were observed for non-agonistic physical contact with conspecifics using scan-sampling every 10 min for 4 h. The contact variable was scored as the number of unique pigs the focal pig was in physical contact with without overt aggression occurring at each scan interval divided by the total number of scan intervals. The four time points are: immediately after mix, and 3, 6, 9 weeks (wk) after mix. Observations at 6 wk were made after pigs were moved to a new pen with their group. Errors bars represent the 95% confidence interval of the least square means. a–c: Bars with different letters denote time periods that showed different proportions of contact behavior (p < 0.05, Tukey, HSD adjusted).