i do think you're right some people would secretly breed them anyway and potentially make them even more violent but i do think there would simply be much less bad owners because to be unlicenced you would either need to either just hope you dont get caught with an animal you arent licenced to have or simply keep the dogs existance a secret. that is assuming that the police would actually enforce this hypothetical licence and not just let people get away with it because zog wants blood to be spilled
United Kingdom