Along the Cumberland River just north of downtown Nashville, Tennessee, tourists on party pontoons float past the recognizable skyline, but they also can see something a little less expected: hundreds of sheep nibbling on the grass along the riverbank.

The urban sheepherder who manages this flock, Zach Richardson, said sometimes the tourist boats will go out of their way to let their passengers get a closer glimpse of the Nashville Chew Crew grazing a few hundred yards away from densely populated residential and commercial buildings.

The joy people get from watching sheep graze is partly why they are becoming trendy workers in some urban areas.