The peace of an otherwise quiet summer weekend is often muddled by the sound of lawn mowers and leaf blowers. In Los Angeles’ business district, an old-fashioned method of ground control provides an alternative soundtrack — the munching of goats.

In a steep hillside city park on Bunker Hill, right next to the world’s shortest railway, 120 goats are about to be deployed. "Oh my gosh, they're so cute," Nate Giddings says as he makes his way to work in a nearby skyscraper.