This topic is like abortion in a way.... LOL! Some will do it some will not... It is in the end its a personal decision. I myself have a male frozen on ice that I well sit on for probably the next 5 to 6 years honestly. For me it will be something I incorporate into my program down the road, which would merely be reinforcing certain genetics that are already present within the particular line, but only if I believe such a thing has become necessary for this particular line to continue to prosper.