JOHN DAY (AP) — Critics have launched a campaign against the federal government’s plan to reduce a herd of wild horses in the mountains of Eastern Oregon. The 250 mustangs in the Murderers Creek herd near John Day in Grant County could be reduced in roundups over the next decade to 50 to 140. Critics have sent more than 6,000 emails and letters to object, The Oregonian newspaper reports. “This is just one example of the government reducing a wild horse herd to a dangerously low number of animals, which jeopardizes the long-term genetic health of the herd,” said Suzanne …