Pigs are kept in large stalls with large numbers of pigs per square metre. The temperature is raised which allows the pig to spend less energy on keeping its body heat at the right temperature so it gets fat quicker enabling the process to be much more efficient. The use of sow stalls for pregnant sows has resulted in lower birth production costs; however, this practice has led to more significant animal welfare concerns. Many of the world’s largest producers of pigs (U.S., Canada, Denmark, Mexico) use sow stalls, but some nations (e.g., the UK) and some U.S. states (e.g., Florida, Arizona, and California) have banned them. From Wikipedia, the free encyclopedia : Breeding and keeping pigs |
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