Is that string just hanging? Have the chickens messed with it?I wanted to share my low feed alert system. I built several of the pvc feeders for my pens but wanted an easy way to see when they started getting low on feed. I tied a "flag" on one end of a long string, drilled a hole into the feeder and fed that string through and tied a weight on the end that is inside the feeder. The weight sits on top of the feed and as the feed level drops, the weight also drops and pulls the string. When the "flag" gets near the top of the feeder I know it is time to add feed. It enables me to know what the feed level is without going into each pen. I need to fashion something similar for the waterers. Anyway, I am proud of it and it was really easy to do. It could be added to most DIY feeders.