The ruling on slaughtering a sick animal to relieve it

Question:
If a person sees a female camel or a goat that has been struck by a disease or a fatal wound, and he kills or slaughters it to relieve it, is that permissible? And is there a difference if that goat is one that is not permissible to take, or is it not permissible?

Answer:
It is not permissible to slaughter an animal except for one of two reasons: either to eat it, if it is of the kind that is eaten, or to ward off harm, if it is of the kind that causes harm. As for slaughtering it with the intention of relieving it, that is not permissible. Rather, it should be left until it dies on its own, or until it recovers and the disease is removed from it. Therefore, an animal may not be slaughtered except for one of two reasons: either for a human to eat it, if it is lawful, or to ward off its harm, if it is of the kind that causes harm. As for slaughtering for the sake of relief, that is not permissible. So the animal should be left with its wound or its illness, and its affair should be left to Allah (Glorified and Exalted is He).