The cruel part of the milk industry is that you forcefully impregnate the goat, splitting the intimate bond between mother goat and her baby in order to take the milk of the mother goat, selling the male goats who end up being slaughtered, coercing the mother goat to be milked by humans instead of letting her being milked by her baby, and usually the killing of the goat when they don't give enough profit.
by consuming animal foods and owning animals one is perpetuating the
property status of animals, which enables all the animal abuse today of
the domesticated animals. As long as any individual, humans or
nonhumans, is property under the law there will be no real protection.
You can learn more here: http://law.bepress.com/cgi/viewcontent.cgi?article=1021&context=rutgersnewarklwps