Wild cattle graze on their own and seem to do pretty well with it, I don't imagine letting domestic cattle graze on fallow fields would be much different. I grew up on a farm where most of the livestock was sheep (which are taxonomically related to cows in the animals-that-go-well-with-gravy family) and they were all wild-grazed. I don't recall any mass sheep poisonings.
Then again, I could be spectacularly wrong.
Boru
Then again, I could be spectacularly wrong.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax