Sometimes what's going on is that the microbes are helping them digest food more efficiently from the same diet, so they're taking more energy from their food, but other times, the microbes are actually affecting their behavior.
Parfois, les microbes les aident à digérer la nourriture de manière plus efficace, et exploiter l’énergie provenant des aliments. Mais d’autres fois, les microbes influencent leur comportement.