Bison would be great to have in the game. A handful of farms out in the great plains raise bison. I would just love to have the ability to have some free-range bison on my farm The Fluffalo from Starbound would be some great inspiration. They're the greatest haha
Maybe open the area that is used for the flower festival and have a plain for grazing mobs maybe open it where you could purchase a second patch of land smaller of course but minus rock and limb spawns so you could raise them. Maybe throw in yak and caribou to keep them company
*clears throat* buffalo wings *coughs* (this is intended as a joke, I'm aware that buffalo are not bison)