USE OF DONKEYS TO GUARD SHEEP AND GOATS IN TEXAS
作者： C. Andy Feild , Murray T. Walton
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摘要: … Donkeys cannot be expected to work well if sheep or goats are scattered. 9. Some donkeys … Despite the availability of Bureau of Land Management donkeys in Texas, this source does …
参考文章(2)
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Jay R. Lorenz, Raymond P. Coppinger, Michael R. Sutherland, Causes and Economic Effects of Mortality in Livestock Guarding Dogs Journal of Range Management. ,vol. 39, pp. 293- 295 ,(1986) , 10.2307/3899764