For each piglet showing scours, diarrhoea was assessed
visually and characterised, by the same person, according to
the following scale as: 0 = no diarrhoea, 1 = soft faeces, 2 =
fluid faeces and 3 = projectile diarrhoea (Sarmiento et al
1988). The daily diarrhoea score for each pen was calculated
by multiplying each piglet by the previous characterisation
scale of diarrhoea, and the results for all piglets within a pen
were then added together. The weekly diarrhoea score for
each pen was calculated as its average daily diarrhoea score
for 7 days. The maximum theoretical daily diarrhoea score
was 36 (12 piglets × scale 3 = 36).