Selecting sows for high welfare production systems
Animal welfare scientists at the Scotland’s Rural College (SRUC) and Newcastle University are helping Sainsbury’s identify ‘good mums’ for free farrowing systems on pig farms. It is hoped the results of this work will encourage more of pig farmers to switch to higher welfare systems where the pregnant sow can be kept loose during and after the birth of her piglets.
Farrowing crates are restrictive for the mother, keeping her in a small space so that she can’t injure her piglets. Free farrowing systems, on the other hand, give the sow space to move around freely while protecting her piglets. The sow can instinctively build a nest in an enclosure with specially designed sloped walls which help her lie down without trapping her offspring.
For free farrowing systems to be economically viable for farmers, the level of piglet mortality must be on a par with that in crate systems. Identifying the best sows for free farrowing systems can help achieve this. The research team will gather data on three commercial farms with free farrowing systems, creating a profile of a ‘good mum’ by measuring each sow’s performance, i.e. number of piglets born and weaned, and her behaviour, i.e. whether she lies down safely (avoiding crushing piglets). They will then determine whether these traits are related, whether they are consistent over time and then whether carefulness can be identified at a pre-breeding age. This data can be used by breeders to help producers pick the best mothers for these systems.
SRUC Researcher, Emma Baxter, says: “It is vital piglet mortality is on par with the crate system so we can show we can maintain the welfare of the piglets as well as improve conditions for the mum.
“We have been working on these free farrowing systems for a number of years. However, now Sainsbury’s is involved we hope we can get the information about how to breed good mothers directly through the supply chain much quicker than through traditional academic routes.
“I hope that this will see more farmers adopting these systems which have sow and piglet welfare at the very heart of their design.”