The one aspect of water utilization that has received considerable scientific attention in the past decade is the method of supply, driven more to
avoid excessive use than to determine the minimum physiological needs
of the pig (Brumm et al., 2000; Li et al., 2005). As the supply of water
becomes an issue in more pork-producing regions, and as the cost of handling manure increases, further investigation of water delivery methods
can be anticipated. As mentioned, compared with North America, Europe
has a longer history, greater experience, and more scientific support on
this topic.