Bro, Sis, you have a moral obligation to say that killing animals has to be banned.
It is bad to kill animals if you don’t have too. Since it is bad, we have to have in our society a rule that says that killing of animals when you don’t have to is forbidden. To create this society you must express that killing of animals when you don’t have to must be forbidden. So you have a moral obligation to say that killing of animals when you don’t have to has to be forbidden.