The collars, which are triggered by sounds in the frequency range of a dog bark (400Hz), are placed on livestock guard dogs. When the dogs bark, which typically occurs when defending livestock from a ...
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Colorado ranchers turn to livestock guardian dogs to deter wolvesLivestock guardian dogs are one of the latest deterrents ... to feed several dogs that can weigh more than 150 pounds, GPS collars and veterinarian care after the first year — cut into their ...
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