Thanks Christopher. Your insights are spot on. It's easy to forget that 63% of all points toward SOP go to body structure. This isn't a new concept either. On reviewing my grandfather's Standard of Excellence rev.c1875, it is clear that body structure has always held preeminence in the poultry breeding standards. Whether breeding for show or breeding for production the body structure lays either a solid foundation or a house of cards for future generations.
If in achieving color through selective breeding while neglecting structure; then little has been achieved. But if, through breeding, a solid body structure is developed yet color is "off"; then it is a far simpler matter in one or two generations to develop SOP color on top of SOP structure, whereas is is always nearly impossible to achieve it the other way round.