Factory-farmed dairy cows endure annual cycles of artificial insemination, mechanized milking for 10 out of 12 months (including 7 months of their 9-month pregnancies), and giving birth. On industrialized dairy facilities, these animals are denied nearly all of their natural behaviors and instincts.
Even if dairy cows are "free range" and "organic" (as if that changes what happens to the male calves) ... slavery and early death is *still* wrong.
We don't need slaves. Go vegan, it's easy.