aoxa, I am a severe duck and sebbie culler. The Dewlaps I am finding it harder to make any cuts, so we will grow them out for a long while before accessing. We do own a copy of the SOP, so I read and refer to it often when judging the birds for selection. One of our cull Khaki drakes went to a pet home recently, the rest went to the freezer.
Temperament in all the birds is a deal breaker for me. they have to be calm and good natured or they are instant freezer material. I wont ever sell an aggressive animal as I dont want to pass off a bad bird making it someone elses problem. We have two ganders (sebastopols) who get along outside of breeding season, but during season they are after each other if given a chance. This is different than an every day aggressive bird, charging, and otherwise creating havoc around here.