My dad was an agro scientist who started out working at a dairy. I once mentioned to him that if I was ever to be a farmer, the only thing I'd want was a dairy farm - lots of cows (I'd have Jerseys) and all that great stainless equipment and so forth.
He told me that owning a dairy farm was the closest thing to legal slavery that still existed - you HAVE to be there twice a day to milk them - NO days off, Ever, NO vacations, Ever, NO rest, Ever.
Oh well - I always liked boats better anyway.
As to bison - my first summer job was at the old Okanagan game farm. They had several female bison and one bull - that thing set a new standard for huge - I'm over 6' and I couldn't see over his shoulder. Their enclosure used telephone poles for fence posts and once he snapped one just by scratching against it.
Seeing one of those gigantic herds on the move 150 years ago must have been absolutely awesome & terrifying. To think that the First Nations hunted them with spears.....