Ok, I've found this board to be very helpful with alot of different issues. I have not posted alot here unless I have a problem that I can't find an answer to anywhere else and ALL of the advice has been excellent. To make a long story short, we have lost 7 calves this year (a totally new thing for us) and we are wondering if maybe our new bull from last year could be the problem. There are really a lot of different times/ways we seem to have lost the calves, but we lost over half to what seems to be a heart attack! An example for one was a 3 day old calf (last to leave the pasture) was be rotated to another pasture and died in the cattle lane! No fore warning, just stopped where is was and died. We have not had a vet to do an autopsy on any of them yet, but are strongly considering it, if we lose any more. We run a 40 cow/calf operation and this has been our worst year! I'm not going to say where our bull came from, but he is registered (Red Angus). With the differences we are seeing in birth weights and the problems we have been having we were just wondering if anyone else out there is having same/like problems this year.