We only have 6 cows due for fall calving. We always keep them separate from the rest of the herd & make sure they have great baleage in front of them at all times, but I don't know if that will be enough for her. She has always been a "fertile myrtle", hence using her for a recip, but if she doesn't breed back timely, we will just shift her to spring calving.
I don't think it is cost effective to grain the 6 cows, but I can put grain in the calf shed for the calves.
Yes, it used to be said that beef cattle had 8% twins and Simmental had 13%. Not sure what % is viable now, but Simmental breed is very fertile. Most embryologists like flushing them. This is the 4 set of twins this year. One set both born dead, 1 set heifer/bull, and the two sets of split embryos.