Changing the law about leaving a cat after it bin hit by a car

My cat was sadly hit and killed by a car today and the person who did it drove off and left him in the road the law says if you hit a dog you can't leave it there you got to take it to the vets so I am setting up this petition to change the law so if you hit a cat you can't leave it in the road because no pet should be left alone dieing on a road think off all the family who pets hasnt came back because it bin hit by a car and just left there so please help me try change this law  please sign and share to get this horrible law change thank you