The Native Americans had no domesticated animals except dogs, no pottery; their tools were made out of wood, leather, woven baskets and netting, stone, and antler. Some shelters were made of branches and mud; some dwellings were built by digging into the ground two to three feet and then building a brush shelter on top covered with animal skins, tules and/or mud. On the coast and somewhat inland traditional architecture consists of rectangular redwood or cedar plank semisubterranean houses. Traditional clothing was minimal in the summer, with tanned deerhide and other animal leathers and furs and coarse woven articles of grass clothing used in winter. Feathers were sewn into prayer pieces worn for ceremonies. Basket weaving was a high form of art and utility, as were canoe making and other carving. Some tribes around Santa Barbara, California, and the Channel Islands were using large plank canoes to fish and trade, while tribes in the California delta and San Francisco Bay Area were using tule canoes and some tribes on the Northwest coast carved redwood dugout canoes.