Table 1. Outline of experimental trials.
| Before treatment (test #1) | Treatment | 24 h after treatment (test #2) | 1 month after treatment (test #3) | |
|---|---|---|---|---|
| Control group (N = 12) | First confrontation test | 2 weeks in the laboratory | Second confrontation test | NA |
| Field group (N = 10) | First confrontation test | Confinement period (2 weeks in the field enclosure) | Second confrontation test | Third confrontation test (N = 9) |