Ihave been raising cattle for about 25 years but have never seen a problem like this one. Ihave a 5year old cow about a week from calving and checked on her this morning and she was sitting up normallly but can not get up. She is in excellent condition , she has had all of her vaccinations. she now has no appetite,and is ginding her teeth. However she is very alert and her ears are not droopy.Her bowels are functioning properly. She has also had free choice high magnesium mineral in the pasture. Any ideas would be appreciated. Thanks