FREDONIA, Ariz. (AP) -- Forest employees have removed more than two tons of cow manure that were marring cultural sites in northern Arizona. The employees from the Kaibab National Forest spent two days this week sifting through sagebrush, scorpions and dirt to remove the manure. Forest officials discovered that the cows had broken through fences this past winter and trampled an area known for its high concentration of pictograph sites. Many of the sites within the Kanab Creek Wilderness are designated as historic and require special protection. They also hold cultural significance to nearby American Indian tribes. The forest is planning other cleanup days throughout the year to address the damage caused by the cows.