Another things is that capitalism will sort all this out anyway. When we reach 60 billion people on earth, (should be around 2050 or so) eating meat will be so expensive that nobody can afford it. Meat takes 10 times the resources than a vegetarian diet. An other alternative is growing muscle in in vitro, without any connection to any conscious brain. I'm certain this will not only be doable, will happen soon, but also be so much more cheaper and tastier, living animals won't be able to "compete". They'll all be zoo and wildlife park attractions.

That's at least my vision of the future.

BTW I have several relatives who are not only scientists but have worked with animal experimentation. It's cruel, it's horrible for them. But they go to extreme lengths to minimize the suffering. And rather them than me having to suffer through some horrible medicine experimentation. One of the research projects was researching a type of muscle in the mouth of the mouse lung, which corresponding muscle is responsible for infant cot death. I'd like a animal rights activist look a parent in the eye who's lost their children to this, and say that research should seize. The same research on humans would of course be illegal, and without animal experimentation, it wouldn't be possible.