The increasing prevalence of PMWS /PDNS within global pig production since 1995 has steadily increased, UK first affected in 1999. Impact on post weaning mortality is variable with rates exceeding 30% commonly reported, no medication or treatments have proved effective or successful, vaccination is still unavailable and the industry is still striving to find the scientific answers and solutions behind this economically damaging disease. Porcine Circovirus 2 (PCV2) is widely acknowledged as the probable causal agent but still not confirmed, if so has it changed or is it a new PCV? With enhanced virulence, a definitive identification and test is urgently required. The objective is to demonstrate how successful specialised management techniques alongside a batch system is capable of reducing post-weaning mortality to pre PMWS levels and to further improve overall herd health, productivity and economic performance.