you just clarified what I had suspected from your original post on this subject. you view normals as expendable because they aren't inherently valuable from an economic standpoint. if your approach to breeding is framed exclusively by your potential for monetary return, you're in the wrong part of the hobby. if you are worried about housing and feeding any 'low end' offspring that may result from your breeding efforts, especially if culling is an option, don't breed. the difference for those who breed feeder rodents is that they're breeding a food supply. it's responsible to raise a stock of animals to be used as a sustainable resource. it's irresponsible to raise a stock of animals solely to make your money back and cull the ones that don't fit your aesthetic requirements or economic/space constraints.