Excerpts from the report Introduction: In the late 1970’s, there began a resurgence in the use of an ancient form of sheep protection, the guarding dog. Several factors contributed to this phenomenon, including Federal restrictions on the use of substances to kill predators, the relative inability of existing techniques to provide adequate relief from predation in certain situations, and a desire by some to use nonlethal methods of reducing the loss of livestock to predators. There are few hard-and-fast rules with respect to dogs and sheep. Many variables interact to produce successful guarding dogs. This bulletin presents information based on experiences of the authors, various researchers, and a growing number of ranchers who have successfully used dogs as part of their program of predator management.