HAVERHILL, Mass. (AP) -- A Haverhill farmer says a pack of as many as 10 coyotes attacked and killed a 400-pound buffalo leaving behind nothing more than hide and bones.

Tyler Kimball says the coyotes killed a 1 ?-year-old female buffalo last weekend that would have been worth $4,000 when fully grown.

He says he has had trouble with coyotes in the past, and has lost cows and calves, but none of his dozen bison has even been attacked. He hadn't lost an animal to coyotes in seven years until a calf was killed earlier this year.

He told The Eagle-Tribune (http://bit.ly/ooRTAl ) the coyotes isolated the buffalo from the herd and drove it to a swampy area before moving in for the kill.

Kimball says state environmental police have given him permission to shoot coyotes.

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Information from: Eagle Tribune, http://www.eagletribune.com

Copyright 2011 The AP.