What kind of jambalaya doesn't have andouille? (Or kielbasa?)
Yeah I know .... I just couldn't stay away from the play on words

. Dirty rice, or beans and rice didn't fit with "lions" ... but jambalaya was in a similar ball park
And why as someone who doesn't believe in gods is it my responsibility to stop animals from killing each other?
Because perhaps you already try to stop animals from killing each other ... humans are animals are we not? So why try to stop us if you're not going to try and stop everyone and everything? (for example).
The believers argument is often, that we are separate and unique from other animals, and it is our "right" to have lordship over them since they are inferior. God made them to be how they are, and god made us to be how we are. We are not allowed to kill each other indiscriminately unless we have a good, god-allowed or god-given clearance to go ahead. But god's cool, overall, with us killing other animals, just not ourselves, because we are supposed to have "morals" and this and that. So a believer might not see that a lion killing a hyena is immoral, since lions were "made that way" and a human is fundamentally different .... a human is supposed to behave as a child of god, etc and so forth. The rules are different for animals as opposed to humans. Plus, we have been given "lordship" over animals to use as we see fit (god given).
Take away concrete moral laws and edicts given by a Creator ... and all we are left with is humans being animals just like every other living animal. The rules that apply to other animals should apply to us also. We are all "equal" ... variations on a theme.
So given that ... why the hell do we care why we kill anything? Do we care whether or not the lion kills a gazelle? Do we care whether or not whale eat plankton? If we view it immoral that we do killing, as animals ... why don't we view it as immoral that other animals do the same thing? So if we are going to have laws and rules governing when and how we can kill something, and whether or not it's even morally appropriate ... why don't we do the same with everything else?
In my eyes, it's the atheist still making a distinction, unconsciously, that the rules SHOULD be different for human beings as opposed to other animals. For whatever reason. It's a sort of "blocking out mentally" of creating all these rules and guidelines for our species, but not for other species as well, even though we communicate, interact with, and rely upon other species for survival, just like we do ourselves. Why not start enforcing murder trials on sharks? Or, why not try and substitute their diet with something other than flesh? We could stop the killing of innocent fish.
There is something irrational about the idea that I am like other animals, yet I hold my species to a specific "moral code" concerning my interaction with other species, but I don't hold those species to the same moral code when they interact with me.
I'm not saying any of this is my actual stance ... I'm just looking at it from the POV of the argument itself as to perhaps why both believers and non believers still make this distinction between "us and them" when it comes to animals, and how we are offended by our own behavior but not that of other animals.