EDMONTON The City of Fort Saskatchewan has been using a herd of sheep as natural lawn mowers for nearly 30 years as an eco-friendly way to care for the city’s pastures. On Wednesday, the Sheep Grazing Program resumed as usual, but there was a new pair of shepherds at the helm. Since 1993, Kathy and Ralph Playdon have tended to the herd. But, after a full life of shepherding, they decided to retire last season and pass the torch to another family. Natasja Steinbusch and her daughter Pien have officially taken over as the new head shepherds. “We’ve never shepherd before like this,” Natasja said. “This is something new for us too.”