Good point, Sillco. As I said, I don't preg check because we can't ship any cows right now anyway. If I were to guess, I would think that they are aborting early in the term. As I said, I'm on a new farm. I think there could be a seriously higher number of parasites here than where I used to live. One guy I know lost 8 heifers in the last two week -40 F cold snap we had. He didn't bother treating them for parasites in the fall and when I was helping him separate his calves in December, I thought they looked awful thin and they just didn't didn't have enough fat to survive. I treated mine with ivomec this fall which is a step up from the louse powder I usually use. They seem to be in better shape than they were last spring and they are eating less. I start calving in about two weeks and if I have 25% open cows this year, I guess I'll start a serious vaccination program for every possible thing that it could be. If that doesn't work, I guess I'll have to settle for calling it a cost of doing business just like all the other ranchers around here.