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I don't fully understand what you're asking. Could you clarify? Are you suggesting they might go extinct? Or something else?
There is more than one question I am asking - (1). Is there any scientifically sound study proving that the quality of protein from plant sources is equivalent to or better than from dairy products? (2). Is there any reproducible, quantitative data on leaving milk producing cows to fend for themselves vs caring for them in small -to- mid size "cow caring" setups (farms, one-cow ops etc.)? I ask this because both my m…
You can look up Peter Singer and Yuval Noah Harari to start with and read what they have written about this. I mention them because they write well and mainly stick to scientifically supported ideas.
I haven't decided where I stand on the issues yet, but with a little research it has become apparent that you can have a very healthy diet without any protein form animals.
I've also discovered that more and more philosophers, ethicists, biologists etc, are starting to make the argument that our factory farming of animals may be the the worst crime in human history.