: We have several beefmaster cows that has been part of our breeding herd for 10 years, how many years should they continue to breed successfully?<p>we had a limousin/angus cross cow for 11 years. she had the best of care but in 2000 had a weak calf that did not nurse or stand for 2 days. we saved it and it was a nice calf for us. this year, she did the same and then prolapsed 12 hours after birth.I feel that she just was too old even though she was still a nice looking, highly maternal cow. I think it would have made a difference if we would have held off on rebreeding her a couple months.