Now let's move onto lesser life forms. How about frogs, dipylidium caninum, grasshoppers, butterflies, dung beetles, cymothoa exigua, bee pupae, ant larvae, phidippus audax? These are animals too..
Some of them might act differently from another. Like a certain one may crawl differently, or can't do something another could. Some might be missing an appendage that makes it act in a way that is different from its hatchlings. Some may have preference for different foods from the same species.
If you thought some of these have souls.. need to rethink your votes.
Sometimes it is common to confuse soul with behavioral instinct. That is why religion tends to lean towards a higher explanation of what a "soul" means.