yes, I can feed them in troughs and use hay/grass/cabbage. they can breed as well, but on the info box when you look at the aurochs in the pen, only the cows show that they have eaten portions of food, and not the bulls, even though they can be seen eating from the troughs. there also doesnt seem to be any sound for their animation when eating from the trough, as opposed to the cows who do make a munching sound.