Ruminants have evolved to develope unit of time rhythms of tum fermentation. This nature-driven sound property involves microbic characteristics of nutrient assimilation. Such unit of time patterns greatly contribute to unit of time responses in microbic and host metabolism to fashionable management methods. As such, before and whereas active any fashionable production approach in foodproducing ruminant business and human food sectors, such unit of time rhythms of tum fermentation should be taken under consideration. This can be to make sure no or least interference with optimum microbic physiology and overall tum and ruminant health.