When farmers are done feeding last year's grass silage they have to start feeding from a new grass silage pit. Often this does not happen from one day to the other, but they will gradually lower the old ingredient and build up the new ingredient.
Currently we do nothing with this. Some farmers have requested some sort of feature where the percentages of both the old and the new ingredient in the ration automatically adjust over a couple of days or weeks.
Old ingredient --> New ingredient
Day 1 100% 0%
Day 2 ... ...
Day 3 ... ...
Day x 0% 100%