Nebraska, The land of corn and cattle | We did it this calving season by using the MGA in bags. fed it for so many days then took them off and then so many days later turned the bulls out. So far its worked out great! We only have about 100 cows so not sure how itd work with a bigger herd. We averaged about 3-4 calves a day for the first 20 days or so then its tapered off, just waiting for a few. but much better than we were. hope that helps |