Loki hadn't had a need to manage his world when he didn't have any living thing in it. But now that he has various creatures with different living conditions and an ecological balance to maintain, it has become prudent that he manages his world very well.
Of course, the ultimate goal of raising these creatures well and increasing their numbers rapidly is to gain a continuous supply of food to eat.
He doesn't plan to eat them while they are still alive, though. If he eats them when they are alive, he will gain more lifespan from them, but this will also consume their souls.
The loss of their souls means that they won't be able to reincarnate anymore. This will represent a permanent loss to the population.
The will of the world can produce souls, but it is a slow and energy-intensive process. So it is not advisable that he eats the creatures alive.
