Hello I am new to goats have 4 males just for vegetation control. Had horses do it last year but they overgrazed quickly. The goats seem to have taken things down but not nearly as much as thought. Only half the pasture has been ustilized and the other is over grown but dry. Both are dry with various grasses shrubs weeds. Do I need to supplement them more then the 5 acres they have? And will they ever clear it for fire breaks? We give loose minerals lawn and yard clippings grains a little every few days.