The dairy industry
I was never okay with it but since having DS I find it heartbreaking that mothers can be forced to get pregnant over and over again just so humans can drink their milk, while their babies are taken away from them at a few days old, deprived of their mothers care and milk.
Not to mention the pain and discomfort of repeated pregnancy, labour, breastfeeding, and mastitis which they have to endure.
Only for those same babies to go through the same process their mother does if female, and to be used for meat if male.
I can't get my head around how (human) mothers are okay with it, no matter how much I try.