Sheep like to eat stuff like grass, which does not appear to be plentiful in the areas in question. You could feed hay, but then the sheep will congregate aroun

Sheep like to eat stuff like grass, which does not appear to be plentiful in the areas in question. You could feed hay, but then the sheep will congregate around the area where you dump the hay instead of wandering around getting blown up. Not to mention that hay (as well as fencing, and possibly water in some of those areas) would be expensive.