The major advantage of weaning in cows is

Solution (By Examveda Team)

The major advantage of weaning cows is to get clean milk.
Weaning is the process of switching an infant's diet from breast milk or formula to other foods and fluids.
Weaning allows the cow to transfer nutrition, previously going into milk production, to her normal body functions including improving her condition and preparing herself for the next calving, and providing clean milk.