Replying to you directly here because it seems like something you would be interested in. The author of the 480 million affected animals estimate has co-author

Replying to you directly here because it seems like something you would be interested in. The author of the 480 million affected animals estimate has co-authored an article addressing this in more detail and with lots of references. I've posted it at https://news.ycombinator.com/item?id=21990825 https://news.ycombinator.com/item?id=21990825