I rescently noticed an issue i have been having between my hippo and my feather duster. My feather opens wide to sweep for food. Rescently my hippo tang has turned bully and nips at the feather mostly all the time. Every time i see the feather bravely reveal its feathers, sure enough here comes the bully. I do not want to seperate these two. Has anyone experienced this before? any ideas on how to resolve the issue without getting rid of anyone? No other fish i have does this, i have a clown, and a Yellow Hawk Tang. No one else seems to care. Im thinking maybe re-arrange the tank to mess up everyones territorial thoughts ? I might try that next.