It should be obvious that different species behave differently based on the forces of evolution. For example, vampire bats (yes, blood sucking bats from South America) tend to show empathy and kindness to other vampire bats. That's not unusual, but what is unusual is that they even do it with unrelated bats. This seemed to be pretty heretical when first discovered because most animals are effectively only concerned about their genetic legacy - children and close relatives.
Initially people thought maybe they had just missed it in other species. However, it turns out that vampire bats are just one of the exceptions to the general rule, most animals are not particularly willing to share or help unrelated animals (obviously there are exceptions). It turns out that vampire bats had gone through some evolutionary bottle necks that made the sharing and compassionate behavior beneficial.
Most species? Like the male lion that will kill the cubs when they defeat the old alpha to become the new alpha of the pack will kill the cubs so the lionesses will instead have his cubs. So in a society where the alpha anthropomorphic lions still have harems with other males challenging them to a fight for control of the harem on a regular basis they may well do the same. They may not look at killing children they did not sire as evil or as anything unusual, it's just the way it works. For that matter they may look at other species, sentient or not, as either competition to be eliminated or prey.
Or not. It's all just made up.