The only time a vet can be really accurate predicting a calving is if he/she preg checks very early in the pregnancy. I mean very early. :shock:
Checking later is just a guess. There's a time frame where you can't even feel the calf, just that the uterus is being stretched down. Later, you can feel the calf, but there's no difference between a small calf due next week and a big calf with three weeks to go. They are the same size.
We bought some bred cows in December, and the vet warned that one in particular was really going to calf soon and we should watch her. Our calving season started six weeks later, and she has calf number 76. :roll:
So much for accuracy.
