We have black cows with a red tinge to their hair coat, newborn calves that are knuckled over at birth, reduced reproductive rates, and increased morbidity rate. What are nutritional influences that can be involved with these symptoms?

The calf morbidity and reduced reproductive rate could be nutrition on the cow side, and calf morbidity could be lower immunoglobulin G in the colostrum, but this doesn’t fit with red hair and knuckled over at birth. Some additional thoughts …