Sheep don't mix well with grizzly bears and wolves. Now they won't mix at all on more than 70,000 acres in the Absaroka-Beartooth wilderness. A 74,000-acre sheep grazing allotment south of Big Timber in the Gallatin National Forest has been permanently closed and the ranchers who used it for generations have been paid to move their sheep elsewhere... The agreement is the eighth -- and second-largest -- in the greater Yellowstone ecosystem in recent years that has led to the retirement of about 300,000 acres from grazing. The latest involves the Ash Mountain and Iron Mountain allotments used for generations...