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.
Nekad je ono što se događa kako im mikrobi pomažu probaviti hranu učinkovitije iz iste prehrane, pa dobijaju više energije iz svoje hrane, no u drugim slučajevima, mikrobi zapravo utječu na njihovo ponašanje.