The hygiene scoring system used was devised by Cook (2002) and divided the body in udder, lower and
upper leg and flank. Each zone was scored from 1‐4, 1 meaning clean, little or no evidence of manure; 2
= clean, only slight manure splashing; 3= dirty, distinct demarcated plaques of manure; and 4= filthy,
confluent plaques of manure.