Humans decide what is right and wrong mainly depending on tribes, too. Penalties are much more likely to a foreigner than a native. It's why we have racism - we give people different attributes, and justify our moral perspective with it. For example the blacks were just animals, interestingly for this conversation.
Animal packs are known to help others - a lone wolf may become integrated into a pack it did not know previously.
Morality, at its core, is about picking the right and wrong action. But for me it's wrong to rape women. For others it's acceptable, especially if they were flaunting themselves. Morality, even in humans, is varied and relative. Wolves choose not to kill each other. This is presumably as a result of evolution - they work together towards a common aim, and all share the spoils. No doubt they don't think that, though. They just don't kill other wolves because it's the right thing to do, despite the fact that to kill them as they slept would grant a good, albeit temporary, supply of food. Similarly, what's good for humanity is good for the person, which is why we have a concept of working towards a common good. Perhaps we don't think of it like that - it's just the right thing to do after all - but we still do it, and we reap the benefits. You wouldn't kill your employer, 'cause then you're out of a job.
Perhaps human morality is more nuanced - we certainly seem to add in more rules from various religions than any animal would - but that doesn't mean animals don't have morals. They just have different morals, and aren't particularly good at expressing them to humans.