It is immoral to require or ask anyone to live or die for you.
Your life is your own. No one else's life is yours.
Secondarily you need to look at how a people live, what is the main tool by which we live?
Wolverines have ferocity, Gazelles run and Ants live in colonies.
We can't truly say that our thumb is our main tool. After all, primates have been shown to use tools to crack nuts or get ants, otters use rocks to open clams and beavers dam rivers to build homes.
Fire? Well, a great many tools and a means of living can be eked out without it. It's not pleasant, but on a small scale people can live without fire.
I would say that the greatest tool we have is our ability to think and reason.
Because of that, anyone or anything that asks us to live outside of reason is immoral.
Would we ask a lion to eat tofu? Of course not.
Would you ask a gazelle to hunt lions? You'd be nuts.
Forcing any animal to act against its nature will result in the death of the animal or its life in captivity.
