When did we introduce broccoli, cauliflower, cabbage.....and beans????
hehehe.
Evidently the oxen and horses do not need such “Particular” vegetables in order to produce truly horrendous flatus. Ordinary grass does just fine.
Just watch out what happens when a mudder eats its fodder!
Your answer can be found here:
"Brassica oleracea is the species of plant that includes many common foods as cultivars, including cabbage, broccoli, cauliflower, kale, Brussels sprouts, savoy, and Chinese kale. In its uncultivated form it is known as wild cabbage. It is native to coastal southern and western Europe. Its tolerance of salt and lime and its intolerance of competition from other plants typically restrict its natural occurrence to limestone sea cliffs, like the chalk cliffs on both sides of the English Channel."