Hi just wondering have you any ideas what to do with my 4 week old duckling,I have 9 4 week olds and up until yesterday they were fine together.I moved them into a big run with a paddling pool ,the run is about 12 feet by 8 feet so its about 5 times bigger than where they were.One of the ducklings has become really aggressive to all of the other ducklings he runs at them and bites their wings and they squeal and if they get into the pool he chases them out,any ideas,thanks Sandra