Mildred is a seven year old Jersey cow that calved ten days ago. Three days ago Mildred quit eating grain. Mildred had typical signs of left displaced abomasum including the characteristic ping heard with a stethoscope under the last three ribs. In addition, the cow's blood chloride level was low. Cows eating a high roughage diet are more likely to be affected.
Cows eating a high concentrate diet are more likely to be affected.
Cows eating roughage low in vitamin E are more likely to be affected. Just this morning, you watched her calve and then stand up. In a few minutes she fell down. Her leg is obviously broken and she can't stand. Now you have an orphan calf.