When on an agricultural exchange, one begins to question every practice at home. You have to question yourself, purely to justify why your method works when you are presented with something completely different. It can quite often be the case that tradition dictates agricultural practices.For example, Swiss cows graze each paddock before the younger animals. Once they have moved on to the next one, the year-old heifers are let out to graze. Once they are finished, the calves are given the chance to eat what is left.