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Are Shock Collars Bad for Dogs?
Shock tactics: can electric dog collars ever be ethical? | Dogs | The Guardian
Electronic shock collars used to train dogs and cats to be banned | Daily Mail Online
Using Shock Collars for Dog Training - Is It Ok? - Whole Dog Journal
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New study reveals dog shock collars cause distress - DogTime
Shock Collars for Dogs: Effective or Outdated?
Version for 2 Dogs] Dog Training Collar/Dog Shock Collar--1000 ft Rem – Trainig-collar.net