Feeding acidogenic diets prior to calving has repeatedly been shown to significantly reduce the risk of milk fever.
Proper rations can also help prevent milk fever, a disease whose incidence increases at the fifth or sixth lactation.
British Dictionary definitions for milk fever
a fever that sometimes occurs shortly after childbirth, once thought to result from engorgement of the breasts with milk but now thought to be caused by infection
(vet science) Also called parturient fever, eclampsia. a disease of cows, goats, etc, occurring shortly after parturition, characterized by low blood calcium levels, paralysis, and loss of consciousness