Modern ideas about how history is written? Please don't give me that!
Adam and Eve and their children for a time were farmers, but we're told that animal husbandry was invented by Lamech's son, Jabal.
Genesis 4:20 Adah gave birth to Jabal; he was the first of those who live in tents and keep livestock.
Genesis 4:20 Adah gave birth to Jabal; he was the first of those who live in tents and keep livestock.
well, that's how it looks to me... I think Jabal's an excellent example... did abel keep livestock before jabel?
Animals definitely ate animals prior to the Great Flood, because fossils show them fighting, eating, digesting each other! Did God say it was 'good'? No. Did He allow it? Yes. Could humanity have eaten meat prior to the Flood? Absolutely, but not for those who were true to the one true God. I hope this helps.
the fossils... well, maybe they were post-flood?