What surprised me was how many common plants, that I've seen growing by the side of the road and along fences, are labeled "poisonous to cattle/horses/sheep" (not many things seem to hurt hogs) besides the few I knew about, like jimson-weed. Boneset, one of my favorites, and plentiful around here, is supposed to be the cause of Abraham Lincoln's mother's death, from drinking too much milk from cows that had been eating it (and apparently without getting sick enough to be noticed themselves.) I wonder if that happens with goats? since I don't plan on drinking any cow's milk.
Probably I need some pasture advice from the county agent, and probably the advice will be too expensive and troublesome to follow, even for four to five acres. We'll see.