Vegetation fermenting in the guts of large herbivores can also produce considerable heat, but this method of maintaining a high and stable temperature would not have been possible for carnivores or for small herbivores or the young of larger herbivores.
Fermentiranje vegetacije u stomacima velikih biljoždera također može stvoriti dosta topline, ali ova metoda održavanja visoke i stabilne temperature nije bila moguća za mesoždere, malene biljoždere ili mlade velikih biljoždera.