A southeastern Idaho ranch lost 176 sheep as the animals ran in fear from two wolves that chased through a herd of about 2,400 animals south of Victor.
Sheepherders for the Siddoway Sheep Co. heard the wolves at about 1 a.m. Saturday, but didn't know the extent of the damage until they saw the sheep piled up on each other at daybreak.
J.C. Siddoway says almost all of the sheep died from asphyxiation. About 10 died of bite wounds and one was partially consumed.
Idaho Wildlife Services State Director Todd Grimm said it's the greatest loss by wolves ever recorded in one instance in the state.
In an earlier attack the same week, the wolves killed a guard dog. The Great Pyrenees guard dog was the third lost by Siddoway since June, according to a release from the company. It also said it lost "about 250 head of livestock to wolf, bear and coyote depredation" since then, and a horse was lost after falling from a cliff after being spooked by wolves.