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.
Soms helpen de microben hen voedsel van hetzelfde dieet efficiënter te verteren, zodat ze meer energie opnemen uit hun voedsel, maar soms hebben de microben invloed op hun gedrag.