Non-farm animals are designed to be used when the animals are unknown and a non-productive component of the farm system. Typically, they would represent animals brought in to clean up a crop for a short period of time or to graze the rows between orchard trees or vines. The option is use Non-farm animals is only available when a crop, fodder or fruit block is modelled. In this case, nutrient intake is estimated from the crop yields on the block Non-farm animals have been allocated to.