2.4. Identification of pigs
Since the aim was to estimate individual pig weight as well as at
group level, pigs needed to be marked for identification. For this
purpose, a specific pattern was stamped on the back of each pig
using blue dye (MS Long spray, Belgian MS Schippers). Fig. 4 shows
the identification patterns used to identify 10 individual pigs. For
further description regarding the identification by using pattern
analysis the reader is referred to Kashiha et al. (2012).