Nid yw cyfreithiau sy'n amddiffyn y cyhoedd rhag cŵn peryglus wedi'u datganoli ac, felly, maent yn fater i Lywodraeth y DU. Fodd bynnag, gellir ymdrin â materion fel bridio, gwerthu anifeiliaid anwes a chodi ymwybyddiaeth o berchnogaeth cyfrifol ar gŵn yng Nghymru.
Laws protecting the public from dangerous dogs are not devolved and as such, are a matter for the UK Government, However, issues such as breeding, pet sales and raising awareness of responsible dog ownership can be dealt with in Wales.