I purchased a bunch of nipples (http://amzn.com/B008AZTHNS) and tapped some buckets for my girls. I love the cleanliness of the setup, but found that the nipples stop working. The food grade buckets were brand new and cleaned. The nipples were dismantled, cleaned & tested before using. They worked great for a bit but then just stopped. Tapping the nipple would simply produce no water any longer. Replaced all the nipples in the bucket and they failed after a few days. I routinely checked the water level, but not the function of the nipples, which lead to a dry spell (they have water outside their coop). I bought a traditional waterer to until i get this figured out, but what a mess, and what a waste of water. Any suggestions to keep them from failing?