If you are having nice sunny weather even temps into the high 50's and no wind gather them all up and take them on a field trip outside let them run around some and exert energy if they are nibbling on each other maybe this will stop if they have something to do.
or maybe block off an area...
Sometimes the ducklings will pull each others down out too but I still think this is normal, we do notice it more when they are wet. They sure are pretty ducklings ❤️
@sourland
Usually around 2 weeks we start to see bald patches on our ducklings it is normal, but if your concerned post pictures so we can say for sure it’s normal. Always a good idea to have pictures available.