Newbie question--I got my nipples (thanks, Neil!) and put one in the cap of a plastic juice bottle. I was wondering if I needed to poke a hole at the other end to get the water to drip. I found that it didnt drip until I poked a small hole in the bottom. I made a pvc pipe waterer for the run and will use the jug in the tractor. My girls are trying to get the hang of using it after I showed them the nipple on the jug. They are only 7 weeks old. How high should I hang the jug and the pipe? I figured 10 inches for my BR and Wyd. Any input would be appreciated.