I am also somewhat religious, but I don't really see them as such. We eat them or we make them as pet because we need to do it. We kill people or befriend them because we feel doing it to them.
To me, every organic being has soul, but it doesn't mean it is OK to treat all of them below us. We are the only truly intelligent being in this planet capable of building civilisation. Does this mean that we could do anything? No, we have responsibilities.
To whom? To ourselves. If we harvest all the resources today, what could we have tomorrow? If I don't take a shower/bath, would I be free of potentially harmful bacterias? If I post in this thread, would that mean I am obliged to hear others' opinion and defend mine, or try to accomodate with other's opinion?