Pasture in relation to horses is not a person but an enclosure the horses are placed in to graze. Although, you might be thinking of: = Louis Pasteur = He is most famous for his work with...
A fugly guy
Switching over, rotating, moving livestock to a new pasture, etc.
It is the development of pasture for Livestock.
He invented pastuerization, so we can drink milk 3-6 days after we get get, otherwise we would probably get ill