Figure 2.

Testing pen for the Isolation and Human Approach Test. For the Isolation Test, only the 1.2 × 1.2 m pen was used. For the Human Approach Test, the pen was opened up to create the 1.2 × 2.4 m pen. The latency for the piglet to explore and cross the Isolation line, cross the Approach Line, and Contact the Human was recorded. The same pen (1.2 × 2.4 m) was used for the Social Challenge Test but without a person present.