The wildlife and animal control manager for the Navajo Nation estimates there are as many as 445,000 dogs roaming dogs on the reservation.

The dogs are a major headache, manager Kevin Gleason said. "They kill everything," he told the Associated Press. "Cats, dogs, cattle, sheep, horses."

Last December, a pack of wild dogs were found mauling a 55-year-old man on the side of a road. An autopsy said Larry Armstrong died from the bites although investigators don't know if he was conscious before the attack.

"We've also had people severely injured by them," Gleason told the AP. "We've had people with horrendous bites."

The tribe euthanizes an average of 6,000 dogs a year, Gleason said.

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Navajo Nation's Dogs Roam Unchecked; Dangerous For People, Livestock (AP 8/16)