Cyflwynwyd y Ddeddf i ymateb i alwadau am weithredu brys gan Awdurdodau Lleol, elusennau ceffylau a’r Heddlu er mwyn mynd i’r afael â’r broblem o bori anghyfreithlon, a ceffylau a merlod yn crwydro ac yn cael eu gadael ledled Cymru.  Mae’r ddeddf yn un o nifer o ddulliau sydd ar gael i Awdurdodau Lleol sy’n dymuno mynd i’r afael â phori anghyfreithlon, trwy ddarparu pwerau cyfreithiol effeithiol.  Mae’r ddeddfwriaeth yn rhoi yr un pwerau cyfreithiol i Awdurdodau Lleol ymafael yn y ceffylau, eu cadw, gwerthu, gwaredu a’u lladd heb greulondeb, wedi iddynt fodloni rhybuddion a therfynau amser penodol, pan fo ceffylau ar dir heb awdurdod cyfreithiol neu heb gydsyniad y perchennog.
The Act was introduced in response to calls for urgent action by Local Authorities, equine charities and the Police, in order to tackle the problem of fly grazing, straying and abandonment of horses and ponies across Wales. The Act is one of a number of tools available to Local Authorities wishing to address the problem of fly grazing through the provision of effective legal powers. The legislation provides all Local Authorities with the same legal powers to seize, impound, sell, dispose and destroy, where appropriate, horses by humane means after certain notifications and time limits are met, when horses are on land without lawful authority or occupier consent.