The National Animal Welfare Advisory Committee released a draft version of the new welfare code for pigs in March.
It recommends restricting the use of farrowing crates to four weeks post-farrowing from the end of this year.
It also limits the use of dry sow stalls to four weeks after mating from 2013 and supports a complete phase-out of the stalls by 2017.
http://www.radionz.co.nz/news/stories/2010/04/26/1247fec1fc7c