Charles, what area are you in and what type of grasses grown in this pasture? Depending on the amount of protien in the grass, they may not have to eat as much (even though they will want to). Also, is there more
land, or just the half acre? I have 4.5 acres and probably less that one acres is pasture/only grows grass. We let our goats free range so they nibble on a bit of everything from cedar, oak, bushes adn other
trees I don't know the name of... If you're worried about half of an acre being too small, can you broaden that?
Also, something we do in the summer and fall, we'll stop on the side of the roads where the grass hasn't been mowed by the
city and we'll cut it down and feed it to our goats. I'm not sure if anyone would have a problem with it, but no one has stopped us and a cop has even driven by us. It allows plenty of extra grass in times of drought or lack of food.