Natasha van Niekerk

IntroductionDespite increased bio-security measures, pigs are often exposed to chronic sub-clinical level of diseases and climatic (heat) stress in commercial farms, causing a lower feed intake and performance. Differences in health or immune status of the pigs is one of the reasons for the large variation in the performance of pigs between commercial farms (Pastorelli et al., 2012). The optimal l ...