Wolves breed problems for Washington ranchers

Fewer cows have been breeding on the range since wolves migrated to northeast Washington, an economic loss little known outside the cattle industry, according to the owners of the region’s largest ranch. The Diamond M ranch estimates that the rate of “open cows” — females that didn’t become pregnant — has increased to about 20 percent from the historic rate of 5 percent.“If wolves were attacking people night and day, I don’t think you’d have too many people pregnant,” said Len McIrvin, the patriarch of the family-owned and -operated ranch.