The rumen bugs require this time for adaptation. The computer feeder and total mixed rations have improved the management of the rumen dramatically. Farmers have said that they now have very few animal digestive upsets on the farm. The symptoms are very clear, including reduced feed intakes, loose manure verging on diarrhea, and a significant drop in milk. A change in forage requires an adjustment period so the rumen bugs can adapt.
Forages are often different in quality and in the species.
The effects of abrupt ration changes in dairy cattle can be seen quickly because of the impact on milk production. The economic loss can be significant. Also, annual milk production will be affected. High producing dairy cows need a uniform feeding schedule and a consistent daily ration. For further information contact the livestock staff in your region.