I don't think 'good milk' is a thing, all mammals produce 'good milk' whilst breastfeeding. Humans for instance produce nutritionally complete breast milk even through famine - https://www.concern.net/news/does-breastmilk-run-out-when-mums-dont-have-enough-food
There is no financial incentive to treat the cows well.
@Thrift3499
@lemm.ee