We bought 7 heifers from a guy two years ago - the next year everything calved normal. That fall we pregged all cows, and had 5 of those 7 either open or way late. Got rid of those 5. This year had one of the original cows abort at 7-8 months. Just pregged all the cows and the remaining two we purchased as heifers are open, along with all of our young 2 and 3 year olds we raised. The old set of 6 year old cows are bred, and have bred up every year with no problem. BVD? Or what did we bring in with those 7 heifers we bought?? Excellent mineral program, good grass hay in the winter. Any ideas?