 The use of gestation crates following mating will be phased out in New Zealand by 2015.However the crates are still legal for up to 4 weeks after farrowing.A review lead by the Ministry for Primary Industries, in 2016, found that "The current code of welfare allows for up to 5% of sows to be retained in crates for a further week (following the 4 week maximum in crates post-farrowing) as nurse sows.