To ensure adequate access to water while minimizing wastage, nipple drinkers should be mounted at shoulder height of the pig if angled 90° from the wall, or 20% above the shoulder if mounted downward at a 45° angle (Figure 6). Thus, the height of nipple drinkers should be adjusted as the pigs grow. It is also desirable to mount the drinkers so pigs must drink “straight on” rather than at an angle; mounting drinkers in corners will help to accomplish this (Gonyou, 1996). Swinging nipple drinkers are becoming increasingly common in the North American pig industry. Bowl drinkers help to reduce water wastage (Bekaert and Daelemans, 1970) but must be carefully managed to avoid excessive fouling, which occurs if improperly positioned in the pen. Bowl drinkers have also been shown to encourage water intake in nursing piglets. Wet-dry feeders, which allow the pig to eat feed either in dry form or to mix it with water prior to consumption, also reduce wastage and tend to increase feed in- take (Gonyou and Lou, 2000). Other types of waterers representing a very small portion of the market include troughs and straw drinkers, the latter requiring pigs to suck water from the water line.