2.2.2. Analysis of piglet position
At the moment the sow began to lift a front foot and placed her knee on the floor, the number and the identity of piglets present in the danger zone, the number of piglets in the sow area and the number of piglets clustered were counted (see definitions in Table 1b). The same number of standing-to-lying down events per sow was analyzed as described under Section 2.2.1. The proportion of piglets which were present in the danger zone, sow area and clustered was calculated as the percentage of piglets in the litter.