When you put plants through an animal to concentrate the nutrients, you're going to get 10% efficiency. In these controlled systems, if you care about efficienc

When you put plants through an animal to concentrate the nutrients, you're going to get 10% efficiency. In these controlled systems, if you care about efficiency, it's always better to eat the plants. (https://en.wikipedia.org/wiki/Trophic_level https://en.wikipedia.org/wiki/Trophic_level).