Due to Denmark’s removal of large amounts of zinc and growth promotants from diets, diarrhea has become a big problem from E. coli. This can cause death in 5 to 8 days after weaning, often with diarrhea not even being seen. Age, weight at weaning, hygiene, climate conditions, feeding strategy, feed formulation, feeding conditions, water supply and density among the pigs are all important factors to take into consideration when dealing with E. coli diarrhea.

Lawsonia diarrhea causes grayish diarrhea, a reduction in weight gain, and usually begins at 3 weeks post-weaning. Proper feed formulation and very good hygiene practice are both helpful in preventing this disease.

Denmark has also seen PRRS and PMWS/Circovirus.