>>629 (OP)
Well, Rothbard didn't think animals have rights. But if they do have rights, then it follows logically that one would be allowed to go to a slaughterhouse and stop the whole thing, stop anyone from buying meat in a supermarket... troublesome, as you can see. I've been browsing the vegan subreddit, and this problem emerges in a lot of threads, with some people saying stuff along the lines of "veganism is a personal choice, you can't force people to stop eating animal products blah blah" and some people immediately responding with "it's not a personal choice to take the animal's life"... which is honestly a good argument to such a weak statement.
I have to say that some vegan thinking can lead to unpeaceful thoughts. It's not absolutely not a necessary part of veganism, but you'll see a lot of misanthropy in vegan circles. Some vegans claim to not want to have children in order to avoid creating potential abusers. It can mess with your thinking and daily life, you will no longer go do the groceries as carefree and peacefully as you did before. With environmentalism it's even worse I think. Environmentalism taken to its logical conclusion honestly leads to high skepticism of human development, high misanthropy in general. Personally I've recently stopped eating meat, and if it's true that eating meat is wrong, then I'm afraid I will no longer be able to enjoy sushi, salami, and other seafood ever again.
Anyways, in a libertarian society animals really wouldn't have rights. The privatization of animals would probably lead to both some protection (no tragedy of the commons) but also continued slaughtering. An advantage is that there wouldn't be governments banning lab-made meat, so way less animal abuse.