Did you know?
Pigs are highly intelligent – with some experts ranking them 4th on the intelligence scale, after humans, primates, whales and dolphins.
In many learning tests, pigs have been known to outperform dogs.
Depending on the type of production system, pigs that are part of the breeding herd can live in very different environments.
The breeding animals in a pig herd include the boars (entire male pigs), gilts (young female pigs that have not yet given birth) and gestating (pregnant) sows. Mating of pigs may occur via natural or artificial insemination. Generally, in indoor systems, boars are housed individually, whereas gestating gilts/sows may be housed in individual stalls or in group pens. In outdoor systems, gilts and sows are kept in paddocks.
Some piggeries operate exclusively as breeder farms, and house only breeding animals, with the progeny (their piglets) being removed from the piggery at, or just after, the weaning phase and sent to farms where they grow out.