Mating Farrowing Ear tag tagging Slaughter Buyer Seling Meat products Krškopolje pig Breeding Program Pig production Parentage Possible critical points Tissue or meat samples Traceability Verification Autochthonous Slaughterhouse Zootechnical documentation Declared characteristics Origin of system Unique identification numbers SIŠ number ID Genomic kindship coefficient Identity by descent Migration other breeds breed verification animals