July 28, 2015


Time right for pig-industry reform

In Canada, large industrial operations designed to raise hundreds to thousands of pigs in confinement have largely replaced the small, mixed farms that dominated the landscape before the Second World War. These pig factories typically rely on liquid manure systems and have been widely criticized for their negative impact on the environment and worker health.

Pig-industry animal-welfare issues may now be coming to the fore with the Dec. 8 CTV current affairs program W5 airing of footage shot by a Mercy For Animals undercover investigator who worked for 10 weeks at Interlake Weanlings, a 3,000-sow operation near Arborg recently purchased by Maple Leaf Foods from the Puratone Corp. I was one of the scientists asked by the animal-protection organization Mercy for Animals Canada to review the undercover footage before its release.

Sows and piglets in farrowing crates.


Sows and piglets in farrowing crates.

The footage revealed numerous welfare issues. Male piglets were routinely castrated in a crude and extremely painful fashion. Their skin was cut into and their abdomens squeezed to expel their testicles, which were then cut off with scissors. No anesthetics or analgesics were used. The failure to use anesthetics is so inherently cruel castration has been banned in some countries (i.e. U.K., Ireland). The European Union is moving toward a full ban on castration -- with or without anesthetics or analgesics -- by 2018.

The severe pain caused by the procedure is fully unnecessary. Studies have shown a mere three per cent of intact male pigs (boars) develop tainted meat from hormone release. Alternatives such as vaccinations exist.

The methods used by Interlake Weanlings to kill undesired piglets and compromised sows were also ineffective and cruel. Piglet thumping (smashing a piglet's head on the concrete or against a metal pole) proved unreliable in bringing about sufficient brain damage to kill. Piglets were often left conscious and suffering. The use of a captive bolt pistol that fires a metal bolt into a sow's skull left many sows conscious and suffering, as evidenced by eye-blinking after receiving the blow.

The majority of the footage was of pigs confined to filthy, metal gestation crates -- 1.2-square-metre cages where pregnant pigs are imprisoned until they are moved to another crate (called a farrowing crate) where they give birth and nurse piglets until forcibly weaned. The video documented animals suffering from painful pressure wounds, eye infections and various other painful conditions such as uterine or rectal prolapses. Some of these health-compromised sows were left to suffer for days and actively abused. For example, a lame sow was kicked, slapped and pulled by her ears to force her to walk to a location where she was then killed.

The video showed how intensive confinement in sow stalls causes chronic psychological distress. These sows exhibited various stereotypical behaviours such as repetitive bar-biting. Such a barren, restrictive environment is unacceptable for any animal, particularly animals as intelligent and sensitive as pigs.

These systems of extreme confinement are not restricted to this barn but widely used across Canada. Yet, alternatives exist. For instance, hoop systems where pigs are group-housed on straw, protected from the elements when needed, allowed access to the outdoors and the ability to interact with others, were widely used before the development of large industrial production units. Hoop barns can easily be adapted, at minimal cost, to house gilts and sows in groups on straw.

Providing straw or some other form of rooting material is a critical requirement in any conversion to group housing. Sows need a substrate that allows them to root, forage and make a nest for their upcoming piglets. Straw relieves frustration and boredom, reducing the risk of aggression.

Straw-based systems are better suited to assist government in achieving its environmental-sustainability objectives with regard to the well-established problems with liquid hog manure. Composted manure can more easily and cheaply be transported to crop areas deficient in phosphorus and is a less costly alternative to existing standard liquid-manure storages and expensive technologies such as anaerobic digestion manure-treatment systems. Properly composted manure kills pathogens and drug-resistant bacteria, stabilizes nutrient retention and renders many harmful chemicals benign. Group housing hoop systems require less concentration of pigs per site, further improving environmental performance.

Straw-based group housing systems are used, or are being implemented, worldwide as gestation crates have been banned in nine U.S. states, Australia, New Zealand, and the entire EU. A growing number of grocery chains are requiring their pork suppliers to phase out sow stalls. These systems could easily be implemented throughout Canada.

Many Manitoba sow barns were built between the late 1990s and 2004, during the rapid government-supported expansion of the industry. According to Manitoba Agriculture swine economic specialists, a barn's lifespan is 15 to 20 years. Given the age of existing barns, most of the province's pig producers now need to replace barns, equipment or both.

Consequently, the costs to convert to group housing are costs the industry will necessarily have to absorb in the next decade. These are not new or unexpected costs. Manitoba pig producers are now in a unique and timely position to transition from sow stalls to alternative systems using group housing on straw.

Despite this, the Manitoba Pork Council in its March 2011 booklet Embracing a Sustainable Future, has committed only "to encouraging producers to phase out gestation stalls by 2025." No provincial government, including Manitoba, has taken steps to end the use of gestation crates.

The undercover footage should heighten growing public concern and action about the use of sow stalls and other routine, inhumane industrial hog-production practices. Will the Manitoba Pork Council and other provincial marketing groups now make a real, meaningful commitment toward a phase-out of gestation stalls without government enacting regulations that support ending what is one of the most egregious forms of confinement used in modern agriculture?


Olivier Berreville, PhD in biology from Dalhousie University. He has presented on various aspects of farmed animal welfare at universities and conferences.


-- Canadian Centre for Policy Alternatives

Republished from the Winnipeg Free Press print edition December 11, 2012 A12


Have Your Say

New to commenting? Check out our Frequently Asked Questions.

Have Your Say


Have Your Say

Comments are open to Winnipeg Free Press Subscribers only. why?


Scroll down to load more