BTW as to the question of a "conscience". No, we don't have a "conscience", meaning, there is no part of the brain that tells you you're doing something right/wrong. What we have, in most people, is empathy. We teach our children that what we would feel in a situation, is what other people feel, but it isn't 100% necessary we even do that, as most primates, most mammals in fact, show empathy in at least a limited scope.
We internalize that message of "the golden rule" and feel a twinge of guilt when we do something we know we wouldn't like. Many of us feel that empathy for animals, which certainly isn't supported by the Bible given the amount of animal sacrifice they did (which I add because that's where you were going with that question). You can be taught not to be empathetic towards animals, but very young children show care for each other and for critters.
Even if we wanted to make the case "god" is our mental Jiminy cricket, how would that explain compassionate Hindus? Or bonobos? It doesn't, is the answer.
Eta what about sociopaths, who literally do not have a "conscience"? Did god miss a couple?