Should Rat killer be taken of shelves?

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i do not agree that such a product should be sold, firstly my main reason why is that i have a cuple as pets no one likes to imagen a animal they like being killed off. not only does it affect its target there are many other animals that are affected, they are thaught of as pest or fears to many people. but i feel strongly about the killing of these animals. why use killer when theres a repelent?.. what are your views on this?