A feeder assembly includes a pan member and a drop tube assembly operatively associated with the pan member for providing feed to the pan member. The pan member has a base portion and an upstanding portion. The upstanding portion has a top surface which varies in vertical height relative to the base portion of the pan member without adjusting the feeder assembly. The upstanding portion also has an outward side surface which varies in radial distance relative to a center of said pan member. The varying top and outward side surfaces may also alternatively be provided for on a rim member which surrounds and is secured to the pan member.