Goats aren't so good at grazing though they will eat some grass. They love tree leaves, blackberry leaves, and scraps of some fruit and veg. They leave lawn browned and ragged from urine and eating. They require some hay and supplement and make a stink if their accommodation is not mucked out every week or so. They find rugged terrain and high ground fun and are servile friendly creatures to their kind masters. Our two goats would be far too much for an urban block unless a lot of food and hay was paid for.