We were wondering how much goats eat. If we just let 1 or 2 graze on our 2 acres would there be enough for them to eat or would we still have to buy lots of feed? Whats the average cost of feeding a goat? Would what i saved on gas for the lawnmower be equal to the cost of feeding the goat? Just an Idea- Mariah EDT: We have determined that goats are too destructive and don't graze as much as sheep. From here on we are comparing sheep vs.goats for lawnmowers. However the question of having to buy them food still stands. Also would i be able to fit the same number of sheep (1 or 2) on my 2 acres? Aren't sheep terrified of dogs? Can you train them to think of the dogs like their flock? Also what would be the best breed for the mowing purpose?