Farming Today - 28/12/2009

Farming Today takes an in-depth look at pig production, following one sow on a Yorkshire farm from pregnancy to progeny. From artificial insemination to electronic feeders controlled by the sows themselves, modern pig breeding is a hi-tech business driven by market forces. Sarah Falkingham also finds out why some boars are on farms but never mate, how pigs develop a hierarchy and can even, it seems, measure time.