This study has identified a simple method of increasing the cleanliness of pigs’ dedicated lying areas, which has important implications for improving the design of pig housing facilities and maximising pig welfare.

The effect of aerating pig slurry during 2 min every 6 h was tested. Aeration increased slurry pH by 0.7 units and NH3 emissions by 20%. CH4 emissions decreased by 40% and no significant N2O emission was detected.

Removal of hydrogen sulphide in a biofilter correlates with the presence of fungi. The biofilter removed more than 60% of hydrogen sulphide in the presence of fungi.

Early social environment can affect the development of aggression in the pig. Group lactation piglets have reduced aggression and skin injuries post-weaning.