A method for preventing or removing a plugging of a feeder duct of a baler. The baler includes a bale chamber including bottom wall in which an inlet opening is formed therein, and a feeder duct including a top wall and a bottom wall extending between a lower end and a upper end of the feeder duct, the top wall providing an upper boundary of the feeder duct and the bottom wall providing a lower boundary of the feeder duct. The method includes steps of increasing a distance between the top wall and the bottom wall of the feeder duct in at least a part of the feeder duct, while leaving an upper boundary provided by the top wall of the feeder duct and a lower boundary provided by the bottom wall of the feeder duct intact, and operating a feeder in the feeder duct.