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Essay on Management and Maintenance of Commercial Piggeries

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Commercial piggeries face the challenge to effectively utilise housing management options to optimise productivity while maintaining animal welfare. The common use of farrowing crates is often a subject of contention as crates are spatially restricting and thought to inhibit natural behaviours (Hales et al., 2014). Increased public awareness of this animal welfare issue has pressured producers to adopt the use of pens as an alternative. The use of pens however is associated with increased sow aggression and higher levels of piglet mortalities (Hales et al., 2013). Health status, aggression and behaviour and reproductive performance of sows were monitored in several studies to investigate the effect housing may have on the welfare of sows …show more content…

Health and nutrition is more easily managed in crates compared to pens. Sows in crates receive a controlled amount of feed and are easier to identify and monitor. In contrast, management of group-housed sows is more time consuming and labour intensive as animals are more difficult to locate and. Inexperience in managing animals can also cause stress to the animals (Johnston & Li, 2013).

Aggression is commonly observed in group housing systems and may cause animals stress. Stress here refers to "an environmental condition that is adverse to the well-being of an animal" (Stott 1981). Aggression may exacerbate fighting-induced injuries and cause lameness. This reduces the fitness of animals, increases the number of culls and may potentially cause sow mortality (Johnston & Li, 2013). Hemsworth et al. (2013) showed that aggression at feeding decreased from about 9 to 7 bouts following an increase in pen space from 1.4 to 3.0 m2/sow. The increase in pen space also resulted in a decrease in plasma cortisol concentrations from about 28 to 21 ng/mL. This outcome alludes to the importance of sufficient space in reducing aggression and stress in group-housed animals. The study also suggested that pen space may affect the reproductive performance as sustained high levels of cortisol can disrupt reproductive processes. Other behaviours seen in sows include

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