FIGURE 2.

Times spent for allogrooming, side‐by‐side contact and sniffing behaviours toward unfamiliar distressed female mice. A, Scheme of the behaviour test. Pairs of resident test mice (R) and cage mates were housed in cages for 4 weeks. Resident test mice were exposed to non‐distressed unfamiliar mice or to unfamiliar mice that had been defeated by aggressor CD1 mice (A). B, Times spent for allogrooming, side‐by‐side contact and sniffing behaviours toward non‐distressed or distressed unfamiliar female mice. Times spent for allogrooming and sniffing behaviours toward distressed unfamiliar female mice were significantly longer than those toward non‐distressed unfamiliar mice. The numbers of animals in the groups for non‐distressed control mice and for distressed mice were 6 and 6, respectively. The maximum, upper quartile, median, lower quartile and minimum values are shown. *P < 0.05 vs non‐distressed control. NS, not significant (Mann‐Whitney U test)