I used to live in farm country, raised horses and sheep and volunteered at the animal shelter. Animal rights types were never concerned about the humane treatment of animals.
Humane treatment of animals is a goal only for those who see domesticated animals as one of the good things on earth. I’m not going to defend all farming practices because I don’t agree with all of them (veal calves). Chicken farming maybe objectionable to some but I don’t see how anyone has a problem with hog farming. All the ones I’ve seen have been high tech clean operations.
Animal rights folks, invariably, reject the biblical idea that humans are a special creation. They believe we are an accident and therefore that all living things have an equal claim on the earth.
We are called to be good stewards and to take care of our animals, but we are not to worship them or be on an equal level with them.