Kennel Club breed standards define ideal dog conformation. Reform of standards that define extreme conformations linked to health problems is essential for welfare improvement.
Breed standard reform is a crucial welfare intervention because standards define the selection pressure that determines dog conformation across thousands of litters annually. Standards that reward extreme flattened faces, excessive skin folds, dwarf limbs, or other conformations linked to health problems create powerful selection toward welfare-compromising phenotypes. Reform requires both regulatory pressure on breed clubs to revise standards and cultural change among judges who reward winning dogs. Progress has been made in some breeds; others remain resistant to change despite compelling welfare evidence. The welfare advocacy priority is maintaining pressure for evidence-based reform across all breeds with significant conformation-welfare problems.